Upgrade proto to 1.7.0 (#13075) #30787

Job	Run time
setup-environment	12s
govulncheck	36s
lint	4m 59s
checks	2m 34s
unittest-matrix (ubuntu-latest, ~1.24)	3m 57s
test-coverage	9m 28s
unittest-matrix (ubuntu-latest, ~1.23)	3m 22s
cross-build-collector (darwin, amd64)	48s
cross-build-collector (linux, amd64)	52s
cross-build-collector (linux, 386)	48s
cross-build-collector (linux, arm, 7)	46s
cross-build-collector (aix, ppc64)	47s
cross-build-collector (linux, arm64)	49s
cross-build-collector (darwin, arm64)	1m 6s
cross-build-collector (linux, ppc64le)	57s
cross-build-collector (windows, amd64)	53s
cross-build-collector (windows, 386)	50s
cross-build-collector (linux, s390x)	59s
unittest	4s
	34m 47s

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