Stop routing session events via the DAP store (#29588)

This cleans up a bunch of indirection and will make it easier to
show the session building state in the debugger terminal

Closes #ISSUE

Release Notes:

- N/A

crates/debugger_ui/src/tests/debugger_panel.rs

@@ -523,8 +523,8 @@ async fn test_handle_error_run_in_terminal_reverse_request(
         .fake_reverse_request::<RunInTerminal>(RunInTerminalRequestArguments {
             kind: None,
             title: None,
-            cwd: path!("/non-existing/path").into(), // invalid/non-existing path will cause the terminal spawn to fail
-            args: vec![],
+            cwd: "".into(),
+            args: vec!["oops".into(), "oops".into()],
             env: None,
             args_can_be_interpreted_by_shell: None,
         })