Introduce HTTP2 health check transport options #15961

Job	Run time
govulncheck	25s
govulncheck	31s
setup-environment	8s
setup-environment	8s
test-coverage	5m 1s
test-coverage	2m 21s
lint	3m 7s
lint	2m 57s
checks	1m 32s
checks	1m 36s
cross-build-collector (darwin, amd64)	40s
cross-build-collector (darwin, amd64)	40s
unittest-matrix (~1.21.4)	1m 31s
unittest-matrix (~1.21.4)	1m 23s
cross-build-collector (darwin, arm64)	37s
cross-build-collector (darwin, arm64)	41s
unittest-matrix (~1.20.11)	1m 13s
unittest-matrix (~1.20.11)	1m 11s
cross-build-collector (linux, 386)	35s
cross-build-collector (linux, 386)	35s
cross-build-collector (linux, amd64)	38s
cross-build-collector (linux, amd64)	35s
cross-build-collector (linux, arm64)	45s
cross-build-collector (linux, arm64)	45s
cross-build-collector (linux, ppc64le)	34s
cross-build-collector (linux, ppc64le)	35s
cross-build-collector (linux, arm, 7)	45s
cross-build-collector (linux, arm, 7)	35s
cross-build-collector (linux, s390x)	40s
cross-build-collector (linux, s390x)	34s
cross-build-collector (windows, 386)	41s
cross-build-collector (windows, 386)	40s
cross-build-collector (windows, amd64)	41s
cross-build-collector (windows, amd64)	41s
unittest	1s
unittest	1s
	36m 3s

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