Support remote write v2 by converting request #11172

Job	Run time
test	15m 14s
build	4m 8s
CodeQL	6m 53s
lint	4m 28s
test-no-race	7m 40s
integration-configs-db	3m 0s
integration (requires_docker)	7m 23s
integration (integration_alertmanager)	4m 3s
integration (integration_backward_compatibility)	10m 6s
integration (integration_memberlist)	7m 52s
integration (integration_querier)	15m 10s
integration (integration_ruler)	5m 44s
integration (integration_query_fuzz)	4m 53s
integration (integration_remote_write_v2)	2m 27s
deploy_website	0s
deploy	0s
	1h 39m 1s

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