Reduce distributor memory usage when error volume is high (#6095) #9460

Job	Run time
lint	3m 59s
CodeQL	6m 33s
build	3m 50s
test	14m 38s
integration-configs-db	2m 7s
integration (requires_docker)	6m 6s
integration (integration_alertmanager)	3m 53s
integration (integration_backward_compatibility)	8m 38s
integration (integration_memberlist)	7m 21s
integration (integration_querier)	12m 8s
integration (integration_ruler)	4m 25s
integration (integration_query_fuzz)	2m 21s
deploy_website	58s
deploy	5m 18s
	1h 22m 15s

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