[ESP32] Use nvs iterator to check if key exists

[shubhamdp]

Problem

• Current ESP32Config::ConfigValueExists() API takes a brute force approach with all the supported data types to find whether a key is present in NVS or not.

Change overview

• Use the nvs_iterator to check if key is present in nvs or not

Testing

• Manually tested the results of an old API and new API.

[github-actions]

PR #16885: Size comparison from a86ad03 to 0665676

Increases (2 builds for esp32)

platform	target	config	section	a86ad03	0665676	change	% change
esp32	all-clusters-app	c3devkit	(read only)	970616	970882	266	0.0
			(read/write)	1395138	1395242	104	0.0
			.flash.rodata	199544	199648	104	0.1
			.flash.text	970616	970882	266	0.0
		m5stack	(read only)	1026335	1026523	188	0.0
			(read/write)	462900	462988	88	0.0
			.flash.rodata	229056	229144	88	0.0
			.flash.text	1020951	1021139	188	0.0

Full report (31 builds for cc13x2_26x2, cyw30739, efr32, esp32, k32w, linux, mbed, nrfconnect, p6, telink)

platform	target	config	section	a86ad03	0665676	change	% change
cc13x2_26x2	lock-ftd	LP_CC2652R7	(read only)	667707	667707	0	0.0
			(read/write)	184036	184036	0	0.0
			.bss	81784	81784	0	0.0
			.data	3132	3132	0	0.0
			.rodata	79627	79627	0	0.0
			.text	587600	587600	0	0.0
	lock-mtd	LP_CC2652R7	(read only)	616835	616835	0	0.0
			(read/write)	154500	154500	0	0.0
			.bss	77512	77512	0	0.0
			.data	3132	3132	0	0.0
			.rodata	79507	79507	0	0.0
			.text	536840	536840	0	0.0
	pump-app	LP_CC2652R7	(read only)	687159	687159	0	0.0
			(read/write)	165744	165744	0	0.0
			.bss	82176	82176	0	0.0
			.data	3164	3164	0	0.0
			.rodata	81703	81703	0	0.0
			.text	604972	604972	0	0.0
	pump-controller-app	LP_CC2652R7	(read only)	669415	669415	0	0.0
			(read/write)	183232	183232	0	0.0
			.bss	81920	81920	0	0.0
			.data	3128	3128	0	0.0
			.rodata	78039	78039	0	0.0
			.text	590892	590892	0	0.0
cyw30739	light	cyw930739m2evb_01	(read/write)	609754	609754	0	0.0
			.app_xip_area	516496	516496	0	0.0
			.bss	76004	76004	0	0.0
			.data	600	600	0	0.0
			.rodata	0	0	0	0.0
			.text	0	0	0	0.0
	lock	cyw930739m2evb_01	(read/write)	567266	567266	0	0.0
			.app_xip_area	475544	475544	0	0.0
			.bss	74508	74508	0	0.0
			.data	564	564	0	0.0
			.rodata	0	0	0	0.0
			.text	0	0	0	0.0
	ota-requestor-no-progress-logging	cyw930739m2evb_01	(read/write)	579182	579182	0	0.0
			.app_xip_area	477804	477804	0	0.0
			.bss	83836	83836	0	0.0
			.data	504	504	0	0.0
			.rodata	0	0	0	0.0
			.text	112	112	0	0.0
efr32	lighting-app	BRD4161A	(read only)	930484	930484	0	0.0
			(read/write)	129128	129128	0	0.0
			.bss	127136	127136	0	0.0
			.data	1992	1992	0	0.0
			.text	930476	930476	0	0.0
		BRD4161A+rpc	(read only)	959492	959492	0	0.0
			(read/write)	145084	145084	0	0.0
			.bss	142912	142912	0	0.0
			.data	2172	2172	0	0.0
			.text	959484	959484	0	0.0
	window-app	BRD4161A	(read only)	859960	859960	0	0.0
			(read/write)	127096	127096	0	0.0
			.bss	125224	125224	0	0.0
			.data	1868	1868	0	0.0
			.text	859952	859952	0	0.0
esp32	all-clusters-app	c3devkit	(read only)	970616	970882	266	0.0
			(read/write)	1395138	1395242	104	0.0
			.dram0.bss	62456	62456	0	0.0
			.dram0.data	14220	14220	0	0.0
			.flash.rodata	199544	199648	104	0.1
			.flash.text	970616	970882	266	0.0
			.iram0.text	62016	62016	0	0.0
		m5stack	(read only)	1026335	1026523	188	0.0
			(read/write)	462900	462988	88	0.0
			.dram0.bss	67984	67984	0	0.0
			.dram0.data	34024	34024	0	0.0
			.flash.rodata	229056	229144	88	0.0
			.flash.text	1020951	1021139	188	0.0
			.iram0.text	123107	123107	0	0.0
k32w	light	k32w061+release	(read/write)	707492	707492	0	0.0
			.bss	77992	77992	0	0.0
			.data	1872	1872	0	0.0
			.text	621828	621828	0	0.0
	lock	k32w061+release	(read/write)	706600	706600	0	0.0
			.bss	77960	77960	0	0.0
			.data	1912	1912	0	0.0
			.text	620928	620928	0	0.0
linux	all-clusters-app	debug	(read only)	2553105	2553105	0	0.0
			(read/write)	143872	143872	0	0.0
			.bss	57472	57472	0	0.0
			.data	1296	1296	0	0.0
			.data.rel.ro	79352	79352	0	0.0
			.dynamic	592	592	0	0.0
			.got	4184	4184	0	0.0
			.init	27	27	0	0.0
			.init_array	952	952	0	0.0
			.rodata	219077	219077	0	0.0
			.text	2169602	2169602	0	0.0
	bridge-app	debug+rpc	(read only)	1783005	1783005	0	0.0
			(read/write)	89880	89880	0	0.0
			.bss	44552	44552	0	0.0
			.data	2000	2000	0	0.0
			.data.rel.ro	38232	38232	0	0.0
			.dynamic	592	592	0	0.0
			.got	3928	3928	0	0.0
			.init	27	27	0	0.0
			.init_array	552	552	0	0.0
			.rodata	147057	147057	0	0.0
			.text	1520085	1520085	0	0.0
	chip-tool	debug	(read only)	10333325	10333325	0	0.0
			(read/write)	356640	356640	0	0.0
			.bss	22080	22080	0	0.0
			.data	1072	1072	0	0.0
			.data.rel.ro	327264	327264	0	0.0
			.dynamic	624	624	0	0.0
			.got	4896	4896	0	0.0
			.init	27	27	0	0.0
			.init_array	664	664	0	0.0
			.rodata	529997	529997	0	0.0
			.text	9015269	9015269	0	0.0
	chip-tool-no-interactive-ipv6only	arm64	(read only)	9941780	9941780	0	0.0
			(read/write)	475633	475633	0	0.0
			.bss	40401	40401	0	0.0
			.data	1136	1136	0	0.0
			.data.rel.ro	374024	374024	0	0.0
			.dynamic	560	560	0	0.0
			.got	56264	56264	0	0.0
			.init	24	24	0	0.0
			.init_array	192	192	0	0.0
			.rodata	503788	503788	0	0.0
			.text	8379380	8379380	0	0.0
	door-lock-app	debug	(read only)	2035729	2035729	0	0.0
			(read/write)	117288	117288	0	0.0
			.bss	47680	47680	0	0.0
			.data	1008	1008	0	0.0
			.data.rel.ro	63176	63176	0	0.0
			.dynamic	592	592	0	0.0
			.got	4128	4128	0	0.0
			.init	27	27	0	0.0
			.init_array	672	672	0	0.0
			.rodata	183649	183649	0	0.0
			.text	1701762	1701762	0	0.0
	lighting-app	debug+rpc	(read only)	2213489	2213489	0	0.0
			(read/write)	124280	124280	0	0.0
			.bss	48960	48960	0	0.0
			.data	1488	1488	0	0.0
			.data.rel.ro	68248	68248	0	0.0
			.dynamic	608	608	0	0.0
			.got	4176	4176	0	0.0
			.init	27	27	0	0.0
			.init_array	752	752	0	0.0
			.rodata	177665	177665	0	0.0
			.text	1876146	1876146	0	0.0
	ota-provider-app	debug	(read only)	1975553	1975553	0	0.0
			(read/write)	113016	113016	0	0.0
			.bss	47584	47584	0	0.0
			.data	1288	1288	0	0.0
			.data.rel.ro	58488	58488	0	0.0
			.dynamic	608	608	0	0.0
			.got	4384	4384	0	0.0
			.init	27	27	0	0.0
			.init_array	624	624	0	0.0
			.rodata	169291	169291	0	0.0
			.text	1653890	1653890	0	0.0
	ota-requestor-app	debug	(read only)	2003425	2003425	0	0.0
			(read/write)	116208	116208	0	0.0
			.bss	48544	48544	0	0.0
			.data	1480	1480	0	0.0
			.data.rel.ro	60696	60696	0	0.0
			.dynamic	592	592	0	0.0
			.got	4192	4192	0	0.0
			.init	27	27	0	0.0
			.init_array	648	648	0	0.0
			.rodata	165652	165652	0	0.0
			.text	1684418	1684418	0	0.0
	shell	debug	(read only)	2468457	2468457	0	0.0
			(read/write)	147824	147824	0	0.0
			.bss	67304	67304	0	0.0
			.data	784	784	0	0.0
			.data.rel.ro	74016	74016	0	0.0
			.dynamic	592	592	0	0.0
			.got	4160	4160	0	0.0
			.init	27	27	0	0.0
			.init_array	928	928	0	0.0
			.rodata	212274	212274	0	0.0
			.text	2098562	2098562	0	0.0
	thermostat-no-ble	arm64	(read only)	2293076	2293076	0	0.0
			(read/write)	148657	148657	0	0.0
			.bss	62849	62849	0	0.0
			.data	1040	1040	0	0.0
			.data.rel.ro	77216	77216	0	0.0
			.dynamic	560	560	0	0.0
			.got	4544	4544	0	0.0
			.init	24	24	0	0.0
			.init_array	360	360	0	0.0
			.rodata	142052	142052	0	0.0
			.text	1927056	1927056	0	0.0
	tv-app	debug	(read only)	2714617	2714617	0	0.0
			(read/write)	248184	248184	0	0.0
			.bss	164624	164624	0	0.0
			.data	3136	3136	0	0.0
			.data.rel.ro	74368	74368	0	0.0
			.dynamic	592	592	0	0.0
			.got	4552	4552	0	0.0
			.init	27	27	0	0.0
			.init_array	896	896	0	0.0
			.rodata	208811	208811	0	0.0
			.text	2330674	2330674	0	0.0
mbed	lock-app	CY8CPROTO_062_4343W+release	(read only)	6224	6224	0	0.0
			(read/write)	2358540	2358540	0	0.0
			.bss	185052	185052	0	0.0
			.data	5760	5760	0	0.0
			.text	1321140	1321140	0	0.0
nrfconnect	all-clusters-app	nrf52840dk_nrf52840	(read/write)	1148079	1148079	0	0.0
			bss	143092	143092	0	0.0
			rodata	143232	143232	0	0.0
			text	786952	786952	0	0.0
p6	all-clusters-app	default	(read/write)	2502984	2502984	0	0.0
			.bss	118488	118488	0	0.0
			.data	2640	2640	0	0.0
			.text	1461248	1461248	0	0.0
	light-app	default	(read/write)	2404472	2404472	0	0.0
			.bss	111944	111944	0	0.0
			.data	2496	2496	0	0.0
			.text	1362736	1362736	0	0.0
	lock-app	default	(read/write)	2368080	2368080	0	0.0
			.bss	111688	111688	0	0.0
			.data	2456	2456	0	0.0
			.text	1326344	1326344	0	0.0
telink	lighting-app	tlsr9518adk80d	(read/write)	791428	791428	0	0.0
			bss	70296	70296	0	0.0
			noinit	40416	40416	0	0.0
			text	561386	561386	0	0.0