Extend ShuffleSharding on READONLY ingesters (#6517) #11163

Job	Run time
CodeQL	7m 15s
build	4m 11s
lint	4m 18s
test	16m 6s
test-no-race	7m 19s
integration (requires_docker)	7m 31s
integration-configs-db	2m 44s
integration (integration_alertmanager)	4m 25s
integration (integration_backward_compatibility)	10m 19s
integration (integration_memberlist)	7m 48s
integration (integration_querier)	15m 30s
integration (integration_ruler)	6m 6s
integration (integration_query_fuzz)	5m 9s
deploy_website	1m 4s
deploy	5m 52s
	1h 45m 37s

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