Add max-inflight-requests limit to store gateway #7722

Job	Run time
test	21m 20s
lint	4m 27s
build	5m 52s
integration (requires_docker)	6m 31s
integration (integration_alertmanager)	4m 32s
integration (integration_backward_compatibility)	10m 7s
integration (integration_memberlist)	9m 2s
integration (integration_querier)	15m 32s
integration (integration_ruler)	4m 35s
integration (integration_query_fuzz)	2m 59s
integration-configs-db	3m 11s
deploy_website	0s
deploy	0s
	1h 28m 8s

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