ssh remote: Handle disconnect on project and show overlay (#19014)

Demo:



https://github.com/user-attachments/assets/e5edf8f3-8c15-482e-a792-6eb619f83de4


Release Notes:

- N/A

---------

Co-authored-by: Bennet <bennet@zed.dev>

crates/collab/src/tests/randomized_test_helpers.rs

@@ -532,9 +532,9 @@ impl<T: RandomizedTest> TestPlan<T> {
                 server.allow_connections();
 
                 for project in client.dev_server_projects().iter() {
-                    project.read_with(&client_cx, |project, _| {
+                    project.read_with(&client_cx, |project, cx| {
                         assert!(
-                            project.is_disconnected(),
+                            project.is_disconnected(cx),
                             "project {:?} should be read only",
                             project.remote_id()
                         )