Declare garage crates using workspace.dependencies

This will allow to really disable "sled" feature without declaring
`default-features = false` in every Cargo.toml where garage_db and
garage_model is used.

See https://doc.rust-lang.org/cargo/reference/workspaces.html#the-dependencies-table

src/rpc/Cargo.toml

@@ -14,7 +14,7 @@ path = "lib.rs"
 # See more keys and their definitions at https://doc.rust-lang.org/cargo/reference/manifest.html
 
 [dependencies]
-garage_util = { version = "0.8.2", path = "../util" }
+garage_util.workspace = true
 
 arc-swap = "1.0"
 bytes = "1.0"