Support remote write v2 by converting request #10761

Job	Run time
lint	4m 16s
test	15m 50s
build	4m 26s
CodeQL	7m 19s
test-no-race	7m 39s
integration-configs-db	3m 16s
integration (requires_docker)	7m 22s
integration (integration_alertmanager)	4m 11s
integration (integration_backward_compatibility)	10m 35s
integration (integration_memberlist)	7m 14s
integration (integration_querier)	14m 59s
integration (integration_ruler)	5m 44s
integration (integration_query_fuzz)	4m 47s
integration (integration_remote_write_v2)	2m 23s
deploy_website	0s
deploy	0s
	1h 40m 1s

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