Finish removing git repository state and scanning logic from worktrees (#27568)

This PR completes the process of moving git repository state storage and
scanning logic from the worktree crate to `project::git_store`.

Release Notes:

- N/A

---------

Co-authored-by: Max Brunsfeld <maxbrunsfeld@gmail.com>
Co-authored-by: Conrad <conrad@zed.dev>

crates/vim/src/normal/search.rs

@@ -783,6 +783,7 @@ mod test {
     async fn test_non_vim_search(cx: &mut gpui::TestAppContext) {
         let mut cx = VimTestContext::new(cx, false).await;
         cx.cx.set_state("ˇone one one one");
+        cx.run_until_parked();
         cx.simulate_keystrokes("cmd-f");
         cx.run_until_parked();