Use synchronous locks in FakeFs

This way, the state can be accessed without running the deterministic
executor.

crates/project/src/worktree.rs

@@ -3729,7 +3729,7 @@ mod tests {
     ) {
         let mut files = Vec::new();
         let mut dirs = Vec::new();
-        for path in fs.as_fake().paths().await {
+        for path in fs.as_fake().paths() {
             if path.starts_with(root_path) {
                 if fs.is_file(&path).await {
                     files.push(path);