Move namespace of proto generated C++ types

[eddyashton]

Resolves #4312.

I opted for a protobuf namespace rather than a grpc namespace, since we're purely talking about the generated protobuf types (we don't use the generated gRPC stubs). Also distinguished ccf::protobuf (things that might be shared as part of general CCF gRPC support) and externalexecutor::protobuf (things extremely specific to the external_executor execution engine).

The annoying side effect of this is that we also change the URLs where these RPCs are served, but I think that's fine because they're hidden in generated gRPC code. I thought we could override those with the google.api.http option, but it turns out that's purely about the JSON mapping, not the gRPC-over-HTTP2 mapping.

[ghost]

grpc_ccf@51029 aka 20221007.18 vs main ewma over 20 builds from 50620 to 51025

Click to see table

main

build_id	build_number	tpcc_virtual_cft^	tpcc_virtual_cft_mem	ls_virtual_cft^	ls_virtual_cft_mem	ls_jwt_virtual_cft^	ls_jwt_virtual_cft_mem	ls_js_virtual_cft^	ls_js_virtual_cft_mem	ls_full_js_virtual_cft^	ls_full_js_virtual_cft_mem	ls_js_jwt_virtual_cft^	ls_js_jwt_virtual_cft_mem	tpcc_sgx_cft^	tpcc_sgx_cft_mem	hist_sgx_cft^	ls_sgx_cft^	ls_sgx_cft_mem	ls_jwt_sgx_cft^	ls_jwt_sgx_cft_mem	ls_js_sgx_cft^	ls_js_sgx_cft_mem	ls_full_js_sgx_cft^	ls_full_js_sgx_cft_mem	ls_js_jwt_sgx_cft^	ls_js_jwt_sgx_cft_mem	RB put (/s)^	CHAMP put (/s)^	RB get (/s)^	CHAMP get (/s)^
50620	20221004.1	11239.8	0	40644.5	0	10587	0	4716.91	0	3685.74	0	3395.47	0	6314.73	8.37592e+07	28727.9	19814.6	1.6126e+07	5571.45	1.50774e+07	2498.25	9.83456e+06	2121.1	9.57242e+06	1932.03	9.04813e+06	900889	1.37182e+06	9.34302e+06	3.56174e+07
50640	20221004.9	11241.3	0	40956.9	0	10399.6	0	4735.03	0	3672.16	0	3385.96	0	6211.03	8.29727e+07	24392.8	19513.4	1.69124e+07	5575.63	1.53396e+07	2540.36	1.00967e+07	2073.5	9.57242e+06	1934.35	9.31027e+06	906911	1.36624e+06	9.20032e+06	3.53707e+07
50662	20221004.17	11391.1	0	43259.3	0	10730.8	0	4598.71	0	3635.31	0	3359.09	0	6299.81	8.32349e+07	25723.8	19685	1.69124e+07	5278.93	1.58639e+07	2540.89	1.00967e+07	2076.8	1.21939e+07	1925.34	9.04813e+06	911509	1.38433e+06	9.25432e+06	3.58663e+07
50695	20221004.32	11710.6	0	43432.4	0	10815	0	4704.88	0	3682.08	0	3243.82	0	6303.06	8.40213e+07	29747.8	19520.1	1.71746e+07	5561.24	1.58639e+07	2490.15	9.83456e+06	2112.8	9.31027e+06	1891.12	9.04813e+06	906390	1.37228e+06	9.28794e+06	3.55556e+07
50717	20221004.42	11317.4	0	40827.8	0	10447.2	0	4621.53	0	3731.5	0	3359.02	0	6350.09	8.32349e+07	32154.5	19695.5	1.66503e+07	5643.42	1.53396e+07	2516.63	9.83456e+06	2129.15	9.57242e+06	1932.35	9.04813e+06	891909	1.34968e+06	9.07801e+06	3.58669e+07
50733	20221004.49	11302.8	0	41283	0	10309.8	0	4629.42	0	3659.51	0	3528.68	0	6407.26	8.37592e+07	25129.1	19702.9	1.6126e+07	5622.39	1.56017e+07	2548.88	1.00967e+07	2142.41	9.31027e+06	1974.64	9.31027e+06	899977	1.37191e+06	9.4334e+06	3.56794e+07
50744	20221004.53	11708.1	0	42415.8	0	10739.6	0	4734.77	0	3668.15	0	3445.06	0	6435.09	8.37592e+07	23004.7	19748.7	1.66503e+07	5620.88	1.53396e+07	2544.22	1.00967e+07	2125.78	9.57242e+06	1932.03	9.04813e+06	881196	1.35557e+06	9.1797e+06	3.54939e+07
50750	20221005.2	10995.9	0	42222.6	0	10390.3	0	4411.31	0	3702.47	0	3361.3	0	6425.91	8.40213e+07	24517.4	19878	1.6126e+07	5602.38	1.56017e+07	2495.03	1.2456e+07	2156.45	9.31027e+06	1934.01	9.31027e+06	896628	1.37902e+06	9.29215e+06	3.58669e+07
50769	20221005.9	11479.8	0	42187.6	0	10099.3	0	4775.02	0	3871.36	0	3396.49	0	6336.03	8.37592e+07	24441	19590.3	1.6126e+07	5561.84	1.53396e+07	2556.91	9.83456e+06	2087.49	9.57242e+06	1932.5	9.31027e+06	906390	1.372e+06	9.27952e+06	3.59298e+07
50778	20221005.12	10740.1	0	40915.2	0	9954.33	0	4611.91	0	3703.39	0	3377.88	0	6251.58	8.24484e+07	24277.1	19490.6	1.63882e+07	5554.05	1.53396e+07	2473.42	1.00967e+07	2076.35	9.31027e+06	1917.35	9.31027e+06	904554	1.38444e+06	9.16331e+06	3.57417e+07
50792	20221005.18	11798.2	0	41437.3	0	10270	0	4675.05	0	3560.85	0	3487.7	0	6282.01	8.37592e+07	26504.4	19199.8	1.6126e+07	5599.88	1.56017e+07	2552.23	1.00967e+07	2122.44	9.57242e+06	1928.84	9.31027e+06	901454	1.35549e+06	9.20437e+06	3.58675e+07
50825	20221005.30	11066.8	0	43698.5	0	10655.7	0	4658.34	0	3695.34	0	3374.99	0	6228.44	8.74292e+07	25744.1	19719.2	1.63882e+07	5611.1	1.58639e+07	2604.78	9.83456e+06	2119.9	9.31027e+06	1938.39	9.04813e+06	872522	1.38023e+06	9.24601e+06	3.58663e+07
50850	20221006.2	11348	0	40797.1	0	10676	0	4688.94	0	3696.51	0	3384.5	0	6229.21	8.27106e+07	25559.2	19754.9	1.66503e+07	5579.31	1.53396e+07	2564.65	9.83456e+06	2109.84	9.31027e+06	1931.02	9.04813e+06	881004	1.37856e+06	9.23763e+06	3.58663e+07
50874	20221006.11	11531.7	0	44439.2	0	10249.9	0	4619.46	0	3646.48	0	3384.72	0	6294.18	8.66428e+07	27370.2	19492.6	1.69124e+07	5217.43	1.53396e+07	2536.76	1.00967e+07	2114.04	1.32424e+07	2006.22	9.04813e+06	894982	1.37182e+06	9.25436e+06	3.58036e+07
50933	20221006.28	10998.8	0	40651.3	0	10803.1	0	4648.81	0	3646.89	0	3371.18	0	5890.25	8.32349e+07	25695.2	19537.4	1.6126e+07	5546.49	1.56017e+07	2420.2	9.57242e+06	2099.96	9.57242e+06	1870.37	9.04813e+06	910257	1.37145e+06	9.32176e+06	3.56794e+07
50956	20221006.36	11200.8	0	43280.1	0	10641.9	0	4322.64	0	3504.67	0	3255.79	0	5869.76	8.27106e+07	21597.6	19647	1.66503e+07	5636.79	1.6126e+07	2480.09	9.57242e+06	2027.12	9.04813e+06	1877.18	9.04813e+06	889551	1.36072e+06	9.21273e+06	3.54325e+07
50972	20221006.42	10821.2	0	41526.4	0	10027.1	0	4574.86	0	3536.17	0	3237.04	0	5917.45	8.32349e+07	24266.6	19779.4	1.58639e+07	5562.98	1.53396e+07	2521.1	9.57242e+06	2068.4	9.31027e+06	1909.31	9.04813e+06	911390	1.37044e+06	9.10218e+06	3.56174e+07
50980	20221007.2	10868.3	0	41467.3	0	10087.3	0	4356.33	0	3414	0	3236.18	0	6218.71	8.3497e+07	25864.8	19358.1	1.6126e+07	5621.58	1.56017e+07	2426.73	9.57242e+06	2031.2	9.57242e+06	1874.24	9.04813e+06	901443	1.34745e+06	9.24184e+06	3.58669e+07
51011	20221007.12	11187.7	0	40597.2	0	10412.8	0	4314.43	0	3399.11	0	3294.19	0	6235.86	8.37592e+07	25389.5	19821	1.69124e+07	5548.36	1.56017e+07	2523.87	9.57242e+06	2059.07	9.31027e+06	1906.84	9.04813e+06	875619	1.37458e+06	9.04985e+06	3.58669e+07
51025	20221007.17	11467.1	0	41236.5	0	10121.7	0	4527.82	0	3615.67	0	3274.8	0	6310.28	8.32349e+07	24578.3	19793.5	1.71746e+07	5621.17	1.53396e+07	2419.48	9.83456e+06	2063.54	9.57242e+06	1918.97	9.04813e+06	895804	1.35574e+06	9.19615e+06	3.56174e+07

grpc_ccf

build_id	build_number	tpcc_virtual_cft^	tpcc_virtual_cft_mem	ls_virtual_cft^	ls_virtual_cft_mem	ls_jwt_virtual_cft^	ls_jwt_virtual_cft_mem	ls_js_virtual_cft^	ls_js_virtual_cft_mem	ls_full_js_virtual_cft^	ls_full_js_virtual_cft_mem	ls_js_jwt_virtual_cft^	ls_js_jwt_virtual_cft_mem	hist_sgx_cft^	tpcc_sgx_cft^	tpcc_sgx_cft_mem	ls_sgx_cft^	ls_sgx_cft_mem	ls_jwt_sgx_cft^	ls_jwt_sgx_cft_mem	ls_js_sgx_cft^	ls_js_sgx_cft_mem	ls_full_js_sgx_cft^	ls_full_js_sgx_cft_mem	ls_js_jwt_sgx_cft^	ls_js_jwt_sgx_cft_mem	RB put (/s)^	CHAMP put (/s)^	RB get (/s)^	CHAMP get (/s)^
51019	20221007.14	11035.6	0	42815.3	0	10254.8	0	4332.85	0	3541.32	0	3380.87	0	23645.9	6216.63	8.37592e+07	19427.8	1.69124e+07	5646.11	1.56017e+07	2432.82	9.57242e+06	2039.58	9.04813e+06	1874.25	9.04813e+06	906109	1.36142e+06	9.22934e+06	3.58042e+07
51029	20221007.18	11405.1	0	43353.5	0	10368.5	0	4571.34	0	3433.51	0	3418.24	0	30676.1	6326.76	8.32349e+07	19759.9	1.63882e+07	5581.31	1.56017e+07	2415.9	9.57242e+06	2029.54	9.31027e+06	1951.97	9.04813e+06	913872	1.38294e+06	9.33451e+06	3.58669e+07

[MahatiC]

I wonder if we should instead rename the externalexecutor to remotedispatcher (or executordispatcher) in this PR or make a separate one for it. I think it would be good to have this reflect it, so that we comply with it in future code changes.

[eddyashton]

I wonder if we should instead rename the externalexecutor to remotedispatcher (or executordispatcher) in this PR or make a separate one for it. I think it would be good to have this reflect it, so that we comply with it in future code changes.

I vote for a separate PR, though yes this is another place where it should be renamed!