Remove dev servers (#19638)

TODO:

- [ ] Check that workspace migration worked
- [ ] Add server migrations and make sure SeaORM files are in sync
(maybe?)

Release Notes:

- N/A

---------

Co-authored-by: Conrad <conrad@zed.dev>
Co-authored-by: Conrad Irwin <conrad.irwin@gmail.com>

crates/workspace/Cargo.toml

@@ -49,7 +49,6 @@ node_runtime.workspace = true
 parking_lot.workspace = true
 postage.workspace = true
 project.workspace = true
-dev_server_projects.workspace = true
 task.workspace = true
 release_channel.workspace = true
 remote.workspace = true