fix query priority throws 5xx when 4xx #8185

Job	Run time
test	18m 11s
build	4m 33s
lint	2m 17s
integration (requires_docker)	5m 2s
integration-configs-db	2m 2s
integration (integration_alertmanager)	3m 55s
integration (integration_backward_compatibility)	11m 33s
integration (integration_memberlist)	6m 57s
integration (integration_querier)	12m 39s
integration (integration_ruler)	3m 39s
integration (integration_query_fuzz)	1m 58s
deploy	0s
deploy_website	0s
	1h 12m 46s

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