[BUG FIX] Mark shared queue tests as needs_torch for CI phasing

CI runs non-torch tests first (without PyTorch installed), then
installs torch and runs needs_torch tests. Without the marker,
these tests ran in Phase 1 and failed on import.

Co-authored-by: Cursor <cursoragent@cursor.com>

Author: hughperkins

tests/python/test_metal_shared_queue.py

@@ -7,6 +7,8 @@
 
 from tests import test_utils
 
+pytestmark = pytest.mark.needs_torch
+
 
 def _get_mps_command_queue() -> int:
     """Extract PyTorch MPS's MTLCommandQueue* as a Python int.