autosave: Respect project autosave settings per file (#13369)

This fixes #13316 by checking whether there are any local workspace
settings for a given file.

Release Notes:

- Fixed `autosave` settings in project-specific settings file being
ignored. ([#13316](https://github.com/zed-industries/zed/issues/13316)).

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

crates/workspace/src/workspace.rs

@@ -3502,11 +3502,11 @@ impl Workspace {
                     if let Some(item) = pane.active_item() {
                         item.workspace_deactivated(cx);
                     }
-                    if matches!(
-                        WorkspaceSettings::get_global(cx).autosave,
-                        AutosaveSetting::OnWindowChange | AutosaveSetting::OnFocusChange
-                    ) {
-                        for item in pane.items() {
+                    for item in pane.items() {
+                        if matches!(
+                            item.workspace_settings(cx).autosave,
+                            AutosaveSetting::OnWindowChange | AutosaveSetting::OnFocusChange
+                        ) {
                             Pane::autosave_item(item.as_ref(), self.project.clone(), cx)
                                 .detach_and_log_err(cx);
                         }