Fixed db password file endline issue #8873

Job	Run time
lint	19m 4s
test	18m 7s
CodeQL	6m 38s
build	4m 43s
integration-configs-db	2m 14s
integration (requires_docker)	5m 40s
integration (integration_alertmanager)	3m 54s
integration (integration_backward_compatibility)	8m 28s
integration (integration_memberlist)	7m 16s
integration (integration_querier)	12m 9s
integration (integration_ruler)	4m 14s
integration (integration_query_fuzz)	2m 35s
deploy_website	0s
deploy	0s
	1h 35m 2s

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