Start separating authentication from connection to collab (#35471)

This pull request should be idempotent, but lays the groundwork for
avoiding to connect to collab in order to interact with AI features
provided by Zed.

Release Notes:

- N/A

---------

Co-authored-by: Marshall Bowers <git@maxdeviant.com>
Co-authored-by: Richard Feldman <oss@rtfeldman.com>

crates/project/src/project.rs

@@ -1362,10 +1362,7 @@ impl Project {
         fs: Arc<dyn Fs>,
         cx: AsyncApp,
     ) -> Result<Entity<Self>> {
-        client
-            .authenticate_and_connect(true, &cx)
-            .await
-            .into_response()?;
+        client.connect(true, &cx).await.into_response()?;
 
         let subscriptions = [
             EntitySubscription::Project(client.subscribe_to_entity::<Self>(remote_id)?),