Add cortex_query_samples_total metric #9590

Job	Run time
CodeQL	6m 28s
CodeQL	6m 28s
test	14m 51s
test	14m 53s
lint	4m 4s
lint	4m 4s
build	4m 0s
build	4m 0s
integration-configs-db	2m 29s
integration-configs-db	2m 29s
integration (requires_docker)	6m 19s
integration (requires_docker)	6m 19s
integration (integration_alertmanager)	4m 36s
integration (integration_alertmanager)	4m 24s
integration (integration_backward_compatibility)	9m 16s
integration (integration_backward_compatibility)	9m 16s
integration (integration_memberlist)	7m 33s
integration (integration_memberlist)	7m 33s
integration (integration_querier)	12m 27s
integration (integration_querier)	12m 27s
integration (integration_ruler)	4m 27s
integration (integration_ruler)	4m 27s
integration (integration_query_fuzz)	2m 19s
integration (integration_query_fuzz)	2m 19s
deploy_website	0s
deploy_website	0s
deploy	0s
deploy	0s
	2h 37m 28s

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