[WIP] Support remote write v2 #10372

Job	Run time
build	4m 0s
build	4m 0s
test	16m 52s
test	17m 28s
lint	4m 23s
lint	4m 23s
CodeQL	7m 14s
CodeQL	7m 14s
integration-configs-db	2m 48s
integration-configs-db	2m 48s
integration (requires_docker)	6m 52s
integration (requires_docker)	6m 52s
integration (integration_alertmanager)	4m 19s
integration (integration_alertmanager)	4m 19s
integration (integration_backward_compatibility)	10m 32s
integration (integration_backward_compatibility)	10m 32s
integration (integration_memberlist)	7m 27s
integration (integration_memberlist)	7m 27s
integration (integration_querier)	15m 32s
integration (integration_querier)	15m 7s
integration (integration_ruler)	5m 35s
integration (integration_ruler)	5m 35s
integration (integration_query_fuzz)	3m 50s
integration (integration_query_fuzz)	3m 50s
integration (integration_remote_write_v2)	2m 8s
integration (integration_remote_write_v2)	2m 8s
deploy_website	0s
deploy_website	0s
deploy	0s
deploy	0s
	3h 3m 15s

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