project: Be explicit about project-searchability for buffers (#37773)

Closes https://github.com/zed-industries/zed/issues/28830

Release Notes:

- Fixed builtin buffers and log views showing up in project search

crates/git_ui/src/git_panel.rs

@@ -388,9 +388,6 @@ pub(crate) fn commit_message_editor(
     window: &mut Window,
     cx: &mut Context<Editor>,
 ) -> Editor {
-    project.update(cx, |this, cx| {
-        this.mark_buffer_as_non_searchable(commit_message_buffer.read(cx).remote_id(), cx);
-    });
     let buffer = cx.new(|cx| MultiBuffer::singleton(commit_message_buffer, cx));
     let max_lines = if in_panel { MAX_PANEL_EDITOR_LINES } else { 18 };
     let mut commit_editor = Editor::new(