docs: espressif: update documentation after ESP-IDF submodule removal #1409

Job	Run time
environment (esp32, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secureb...	2m 35s
environment (esp32, serialrecovery)	2m 18s
environment (esp32s2, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	2m 20s
environment (esp32s2, serialrecovery)	2m 20s
environment (esp32s3, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	2m 13s
environment (esp32s3, serialrecovery)	2m 7s
environment (esp32c3, secureboot-sign-rsa2048,secureboot-sign-rsa3072,secureboot-sign-ec256,secur...	3m 26s
environment (esp32c3, serialrecovery)	2m 31s
environment (esp32, multi-image,multi-boot, multi)	2m 33s
environment (esp32s3, multi-image,multi-boot, multi)	2m 32s
	24m 55s

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