Fix strides assertion for torch CAI: allow explicit C-contiguous strides

torch's __cuda_array_interface__ always reports strides, even for
C-contiguous tensors. Use the same assertion pattern as the other
_check_view methods: allow strides to equal the C-contiguous values
instead of requiring None.

Verified locally: 7/7 torch CAI tests pass.

Co-Authored-By: Claude Opus 4.6 (1M context) <noreply@anthropic.com>

Author: leofang

cuda_core/tests/test_utils.py

@@ -348,10 +348,7 @@ def _check_view(self, view, in_arr, dev):
         assert view.shape == expected_shape
         assert view.size == _arr_size(in_arr)
         strides_in_counts = _arr_strides_in_counts(in_arr)
-        if _arr_is_c_contiguous(in_arr):
-            assert view.strides is None
-        else:
-            assert view.strides == strides_in_counts
+        assert (_arr_is_c_contiguous(in_arr) and view.strides is None) or view.strides == strides_in_counts
         assert view.device_id == dev.device_id
         assert view.is_device_accessible is True
         assert view.exporting_obj is in_arr