Use new multibuffer excerpts in find-all-references and friends (#27876)

Release Notes:

- N/A

---------

Co-authored-by: Kirill Bulatov <mail4score@gmail.com>

crates/git_ui/src/commit_view.rs

@@ -44,8 +44,8 @@ struct CommitMetadataFile {
     worktree_id: WorktreeId,
 }
 
-const COMMIT_METADATA_NAMESPACE: &'static str = "0";
-const FILE_NAMESPACE: &'static str = "1";
+const COMMIT_METADATA_NAMESPACE: u32 = 0;
+const FILE_NAMESPACE: u32 = 1;
 
 impl CommitView {
     pub fn open(