refactor: pull configs out of `shared` #2911

Job	Run time
build-with-samply / Security, License Check	24s
build-with-samply / Build (amd64)	2m 50s
build-with-samply / Build (amd64, sockets)	2m 40s
build-with-samply / Cargo fmt check	0s
build-with-samply / Test (sockets)	1m 8s
build-with-samply / Test	59s
build-with-samply / Docker (beam-broker, sockets) / Tidy GHCR images (samply/beam-broker)	23s
build-with-samply / Docker (beam-broker, sockets) / Dockerize (beam-broker) (-sockets)	48s
build-with-samply / Docker (beam-proxy) / Dockerize (beam-proxy)	47s
build-with-samply / Docker (beam-proxy, sockets) / Tidy GHCR images (samply/beam-proxy)	30s
build-with-samply / Docker (beam-proxy) / Tidy GHCR images (samply/beam-proxy)	23s
build-with-samply / Docker (beam-proxy, sockets) / Dockerize (beam-proxy) (-sockets)	1m 21s
build-with-samply / Docker (beam-broker) / Tidy GHCR images (samply/beam-broker)	26s
build-with-samply / Docker (beam-broker) / Dockerize (beam-broker)	1m 10s
	13m 49s

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