Log split queries at query frontend #8183

Job	Run time
test	17m 57s
lint	19m 35s
build	5m 13s
integration-configs-db	2m 5s
integration (requires_docker)	5m 8s
integration (integration_alertmanager)	3m 50s
integration (integration_backward_compatibility)	10m 57s
integration (integration_memberlist)	7m 5s
integration (integration_querier)	12m 49s
integration (integration_ruler)	3m 37s
integration (integration_query_fuzz)	1m 57s
deploy_website	0s
deploy	0s
	1h 30m 13s

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