Bump golang.org/x/sync from 0.6.0 to 0.7.0 #8890

Job	Run time
test	18m 33s
build	3m 52s
CodeQL	6m 41s
lint	19m 45s
integration (requires_docker)	5m 49s
integration (integration_alertmanager)	3m 41s
integration (integration_backward_compatibility)	9m 3s
integration-configs-db	2m 8s
integration (integration_memberlist)	7m 36s
integration (integration_querier)	12m 13s
integration (integration_ruler)	4m 28s
integration (integration_query_fuzz)	2m 38s
deploy_website	0s
deploy	0s
	1h 36m 27s

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