refactor protobuf config logic #9

Job	Run time
test	14m 54s
CodeQL	6m 55s
lint	2m 28s
build	3m 58s
integration-configs-db	2m 19s
integration (requires_docker)	6m 18s
integration (integration_alertmanager)	4m 23s
integration (integration_backward_compatibility)	9m 20s
integration (integration_memberlist)	8m 0s
integration (integration_querier)	12m 13s
integration (integration_ruler)	5m 2s
integration (integration_query_fuzz)	2m 27s
deploy_website	0s
deploy	0s
	1h 18m 17s

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