Allow ruler to retrieve proto format query response (#6345) #94

Job	Run time
build	4m 4s
CodeQL	6m 52s
lint	4m 29s
test	15m 52s
test-no-race	7m 18s
integration-configs-db	2m 52s
integration (requires_docker)	7m 19s
integration (integration_alertmanager)	4m 22s
integration (integration_backward_compatibility)	10m 54s
integration (integration_memberlist)	7m 37s
integration (integration_querier)	15m 26s
integration (integration_ruler)	6m 3s
integration (integration_query_fuzz)	4m 49s
deploy_website	0s
deploy	0s
	1h 37m 57s

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