Fix race on the string interning #10661

Job	Run time
test	39m 22s
test	7m 9s
CodeQL	7m 19s
CodeQL	7m 19s
build	4m 13s
build	4m 13s
lint	4m 26s
lint	4m 26s
integration (requires_docker)	7m 41s
integration (requires_docker)	7m 41s
integration-configs-db	2m 57s
integration-configs-db	2m 57s
integration (integration_alertmanager)	4m 10s
integration (integration_alertmanager)	4m 10s
integration (integration_backward_compatibility)	10m 39s
integration (integration_backward_compatibility)	10m 39s
integration (integration_memberlist)	7m 20s
integration (integration_memberlist)	7m 20s
integration (integration_querier)	15m 13s
integration (integration_querier)	15m 13s
integration (integration_ruler)	5m 34s
integration (integration_ruler)	5m 34s
integration (integration_query_fuzz)	4m 49s
integration (integration_query_fuzz)	4m 50s
deploy_website	1s
deploy_website	1s
deploy	1s
deploy	1s
	3h 15m 18s

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