[configopaque] Mark as stable #17266

Job	Run time
govulncheck	30s
setup-environment	8s
lint	3m 7s
checks	1m 50s
test-coverage	2m 45s
cross-build-collector (darwin, amd64)	36s
unittest-matrix (~1.21.5)	2m 36s
cross-build-collector (darwin, arm64)	40s
unittest-matrix (~1.20.12)	2m 6s
cross-build-collector (linux, 386)	46s
cross-build-collector (linux, amd64)	40s
cross-build-collector (linux, arm64)	38s
cross-build-collector (linux, ppc64le)	40s
cross-build-collector (linux, arm, 7)	47s
cross-build-collector (linux, s390x)	39s
cross-build-collector (windows, 386)	43s
cross-build-collector (windows, amd64)	37s
unittest	1s
	19m 49s

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