Support confmap providers in discovery config #6779

Job	Run time
setup-environment	1m 33s
generate-metrics	7m 47s
coverage	5m 45s
gofmt	8m 29s
lint	16m 51s
cross-compile (binaries-darwin_amd64)	6m 51s
test	19m 16s
cross-compile (binaries-darwin_arm64)	8m 50s
tidy	3m 38s
cross-compile (binaries-linux_amd64)	6m 41s
cross-compile (binaries-linux_arm64)	7m 7s
cross-compile (binaries-windows_amd64)	7m 54s
cross-compile (binaries-linux_ppc64le)	7m 53s
	1h 48m 35s

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