chore: Fix several style lints (#17488)

It's not comprehensive enough to start linting on `style` group, but
hey, it's a start.

Release Notes:

- N/A

crates/collab/src/tests/random_project_collaboration_tests.rs

@@ -282,7 +282,7 @@ impl RandomizedTest for ProjectCollaborationTest {
                             let mut paths = client.fs().paths(false);
                             paths.remove(0);
                             let new_root_path = if paths.is_empty() || rng.gen() {
-                                Path::new("/").join(&plan.next_root_dir_name())
+                                Path::new("/").join(plan.next_root_dir_name())
                             } else {
                                 paths.choose(rng).unwrap().clone()
                             };