Update Build Image with `envsubst` #10469

Job	Run time
test	15m 33s
build	4m 5s
CodeQL	6m 30s
lint	4m 13s
integration-configs-db	2m 31s
integration (requires_docker)	7m 12s
integration (integration_alertmanager)	4m 4s
integration (integration_backward_compatibility)	10m 33s
integration (integration_memberlist)	8m 26s
integration (integration_querier)	15m 10s
integration (integration_ruler)	5m 44s
integration (integration_query_fuzz)	4m 50s
deploy_website	0s
deploy	0s
	1h 28m 51s

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