Add default partition when no matching labelset liimits #10740

Job	Run time
test-no-race	7m 38s
lint	4m 40s
CodeQL	7m 17s
build	5m 52s
test	16m 18s
integration-configs-db	3m 4s
integration (requires_docker)	7m 38s
integration (integration_alertmanager)	4m 19s
integration (integration_backward_compatibility)	10m 59s
integration (integration_memberlist)	8m 5s
integration (integration_querier)	15m 30s
integration (integration_ruler)	5m 43s
integration (integration_query_fuzz)	4m 35s
deploy_website	0s
deploy	0s
	1h 41m 38s

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