[receiver/discovery] Do not emit endpoint that are not evaluated yet #9823

Job	Run time
setup-environment	45s
tidy	1m 14s
generate-metrics	4m 10s
coverage	5m 50s
gofmt	4m 9s
cross-compile (binaries-darwin_amd64)	4m 10s
lint	12m 17s
test	12m 34s
cross-compile (binaries-darwin_arm64)	4m 13s
cross-compile (binaries-linux_amd64)	4m 18s
cross-compile (binaries-linux_arm64)	4m 5s
cross-compile (binaries-windows_amd64)	4m 23s
cross-compile (binaries-linux_ppc64le)	4m 16s
	1h 6m 24s

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