refactor: pull configs out of `shared` #2900

Job	Run time
build-with-samply / Security, License Check	27s
build-with-samply / Build (amd64, sockets)	3m 39s
build-with-samply / Build (amd64)	3m 31s
build-with-samply / Cargo fmt check	-1s
build-with-samply / Test	1m 15s
build-with-samply / Test (sockets)	1m 39s
build-with-samply / Docker (beam-broker) / Dockerize (beam-broker)	1m 39s
build-with-samply / Docker (beam-broker, sockets) / Dockerize (beam-broker) (-sockets)	1m 5s
build-with-samply / Docker (beam-broker, sockets) / Tidy GHCR images (samply/beam-broker)	24s
build-with-samply / Docker (beam-broker) / Tidy GHCR images (samply/beam-broker)	32s
build-with-samply / Docker (beam-proxy, sockets) / Tidy GHCR images (samply/beam-proxy)	42s
build-with-samply / Docker (beam-proxy) / Tidy GHCR images (samply/beam-proxy)	42s
build-with-samply / Docker (beam-proxy) / Dockerize (beam-proxy)	1m 36s
build-with-samply / Docker (beam-proxy, sockets) / Dockerize (beam-proxy) (-sockets)	1m 4s
	18m 14s

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