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/assistant/src/assistant_panel.rs

@@ -963,7 +963,7 @@ impl AssistantPanel {
 
     fn new_context(&mut self, cx: &mut ViewContext<Self>) -> Option<View<ContextEditor>> {
         let project = self.project.read(cx);
-        if project.is_via_collab() && project.dev_server_project_id().is_none() {
+        if project.is_via_collab() {
             let task = self
                 .context_store
                 .update(cx, |store, cx| store.create_remote_context(cx));