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/collab/src/tests/following_tests.rs

@@ -2098,7 +2098,7 @@ async fn test_following_after_replacement(cx_a: &mut TestAppContext, cx_b: &mut
     share_workspace(&workspace, cx_a).await.unwrap();
     let buffer = workspace.update(cx_a, |workspace, cx| {
         workspace.project().update(cx, |project, cx| {
-            project.create_local_buffer(&sample_text(26, 5, 'a'), None, cx)
+            project.create_local_buffer(&sample_text(26, 5, 'a'), None, false, cx)
         })
     });
     let multibuffer = cx_a.new(|cx| {

crates/collab/src/tests/integration_tests.rs

@@ -2506,7 +2506,7 @@ async fn test_propagate_saves_and_fs_changes(
     });
 
     let new_buffer_a = project_a
-        .update(cx_a, |p, cx| p.create_buffer(cx))
+        .update(cx_a, |p, cx| p.create_buffer(false, cx))
         .await
         .unwrap();