Fix: expanded postings can cache wrong data when queries are issued "in the future" #11151

Job	Run time
CodeQL	6m 55s
build	4m 6s
test	16m 4s
lint	4m 28s
test-no-race	7m 35s
integration-configs-db	2m 55s
integration (requires_docker)	7m 2s
integration (integration_alertmanager)	4m 15s
integration (integration_backward_compatibility)	10m 32s
integration (integration_memberlist)	7m 39s
integration (integration_querier)	15m 29s
integration (integration_ruler)	5m 56s
integration (integration_query_fuzz)	5m 17s
deploy_website	0s
deploy	0s
	1h 38m 13s

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