Add docs for open telemetry collector (#6429) #10764

Job	Run time
build	4m 14s
build	4m 14s
CodeQL	7m 15s
CodeQL	7m 15s
lint	4m 19s
lint	4m 19s
test	13m 29s
test	15m 49s
test-no-race	7m 30s
test-no-race	7m 30s
integration-configs-db	2m 51s
integration-configs-db	2m 51s
integration (requires_docker)	7m 18s
integration (requires_docker)	7m 18s
integration (integration_alertmanager)	4m 9s
integration (integration_alertmanager)	4m 9s
integration (integration_backward_compatibility)	10m 48s
integration (integration_backward_compatibility)	10m 48s
integration (integration_memberlist)	8m 4s
integration (integration_memberlist)	8m 4s
integration (integration_querier)	14m 48s
integration (integration_querier)	14m 48s
integration (integration_ruler)	5m 38s
integration (integration_ruler)	5m 38s
integration (integration_query_fuzz)	4m 53s
integration (integration_query_fuzz)	4m 53s
deploy_website	0s
deploy_website	52s
deploy	0s
deploy	4m 42s
	3h 18m 26s

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