refactor: pull configs out of `shared` #2907

Job	Run time
build-with-samply / Build (amd64)	2m 29s
build-with-samply / Build (amd64, sockets)	2m 19s
build-with-samply / Security, License Check	20s
build-with-samply / Cargo fmt check	0s
build-with-samply / Test	56s
build-with-samply / Test (sockets)	57s
build-with-samply / Docker (beam-broker, sockets) / Tidy GHCR images (samply/beam-broker)	25s
build-with-samply / Docker (beam-broker) / Tidy GHCR images (samply/beam-broker)	28s
build-with-samply / Docker (beam-broker) / Dockerize (beam-broker)	1m 18s
build-with-samply / Docker (beam-broker, sockets) / Dockerize (beam-broker) (-sockets)	1m 16s
build-with-samply / Docker (beam-proxy) / Tidy GHCR images (samply/beam-proxy)	26s
build-with-samply / Docker (beam-proxy, sockets) / Tidy GHCR images (samply/beam-proxy)	24s
build-with-samply / Docker (beam-proxy) / Dockerize (beam-proxy)	51s
build-with-samply / Docker (beam-proxy, sockets) / Dockerize (beam-proxy) (-sockets)	1m 8s
	13m 17s

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