Fix a bunch of other low-hanging style lints (#36498)

- **Fix a bunch of low hanging style lints like unnecessary-return**
- **Fix single worktree violation**
- **And the rest**

Release Notes:

- N/A

extensions/test-extension/src/test_extension.rs

@@ -19,7 +19,7 @@ impl TestExtension {
         println!("{}", String::from_utf8_lossy(&echo_output.stdout));
 
         if let Some(path) = &self.cached_binary_path
-            && fs::metadata(path).map_or(false, |stat| stat.is_file())
+            && fs::metadata(path).is_ok_and(|stat| stat.is_file())
         {
             return Ok(path.clone());
         }
@@ -61,7 +61,7 @@ impl TestExtension {
         let version_dir = format!("gleam-{}", release.version);
         let binary_path = format!("{version_dir}/gleam");
 
-        if !fs::metadata(&binary_path).map_or(false, |stat| stat.is_file()) {
+        if !fs::metadata(&binary_path).is_ok_and(|stat| stat.is_file()) {
             zed::set_language_server_installation_status(
                 language_server_id,
                 &zed::LanguageServerInstallationStatus::Downloading,