chore: pkg import only once #8008

Job	Run time
test	17m 48s
lint	15m 56s
build	3m 49s
integration-configs-db	2m 57s
integration (requires_docker)	4m 59s
integration (integration_alertmanager)	4m 50s
integration (integration_backward_compatibility)	11m 26s
integration (integration_memberlist)	7m 18s
integration (integration_querier)	15m 0s
integration (integration_ruler)	4m 37s
integration (integration_query_fuzz)	1m 51s
deploy_website	0s
deploy	0s
	1h 30m 31s

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