Fix race on the string interning #10663

Job	Run time
build	4m 6s
build	4m 6s
CodeQL	4m 32s
CodeQL	7m 10s
lint	4m 25s
lint	4m 17s
test	4m 27s
test	15m 48s
integration-configs-db	12s
integration-configs-db	2m 42s
integration (requires_docker)	12s
integration (requires_docker)	7m 28s
integration (integration_alertmanager)	12s
integration (integration_alertmanager)	3m 57s
integration (integration_backward_compatibility)	11s
integration (integration_backward_compatibility)	10m 53s
integration (integration_memberlist)	12s
integration (integration_memberlist)	7m 51s
integration (integration_querier)	12s
integration (integration_querier)	15m 4s
integration (integration_ruler)	12s
integration (integration_ruler)	5m 38s
integration (integration_query_fuzz)	12s
integration (integration_query_fuzz)	5m 0s
deploy_website	1s
deploy_website	0s
deploy	1s
deploy	0s
	1h 49m 1s

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