Fix test files to use new cuda.core._* import paths

[UNTESTED] Update test files to access internal modules via cuda.core._*
instead of cuda.core.experimental._*. This fixes test failures after
the namespace migration.

Author: rwgk

cuda_core/tests/test_context.py

@@ -8,7 +8,7 @@
 
 def test_context_init_disabled():
     with pytest.raises(RuntimeError, match=r"^Context objects cannot be instantiated directly\."):
-        cuda.core.experimental._context.Context()  # Ensure back door is locked.
+        cuda.core._context.Context()  # Ensure back door is locked.
 
 
 # ============================================================================

cuda_core/tests/test_device.py

@@ -14,7 +14,7 @@
 
 def test_device_init_disabled():
     with pytest.raises(RuntimeError, match=r"^DeviceProperties cannot be instantiated directly\."):
-        cuda.core.experimental._device.DeviceProperties()  # Ensure back door is locked.
+        cuda.core._device.DeviceProperties()  # Ensure back door is locked.
 
 
 @pytest.fixture(scope="module")

cuda_core/tests/test_event.py

@@ -17,7 +17,7 @@
 
 def test_event_init_disabled():
     with pytest.raises(RuntimeError, match=r"^Event objects cannot be instantiated directly\."):
-        cuda.core.experimental._event.Event()  # Ensure back door is locked.
+        cuda.core._event.Event()  # Ensure back door is locked.
 
 
 def test_timing_success(init_cuda):

cuda_core/tests/test_module.py

@@ -41,17 +41,17 @@ def cuda12_4_prerequisite_check():
 
 def test_kernel_attributes_init_disabled():
     with pytest.raises(RuntimeError, match=r"^KernelAttributes cannot be instantiated directly\."):
-        cuda.core.experimental._module.KernelAttributes()  # Ensure back door is locked.
+        cuda.core._module.KernelAttributes()  # Ensure back door is locked.
 
 
 def test_kernel_occupancy_init_disabled():
     with pytest.raises(RuntimeError, match=r"^KernelOccupancy cannot be instantiated directly\."):
-        cuda.core.experimental._module.KernelOccupancy()  # Ensure back door is locked.
+        cuda.core._module.KernelOccupancy()  # Ensure back door is locked.
 
 
 def test_kernel_init_disabled():
     with pytest.raises(RuntimeError, match=r"^Kernel objects cannot be instantiated directly\."):
-        cuda.core.experimental._module.Kernel()  # Ensure back door is locked.
+        cuda.core._module.Kernel()  # Ensure back door is locked.
 
 
 def test_object_code_init_disabled():

cuda_core/tests/test_utils.py

@@ -19,7 +19,7 @@
 
 
 def test_cast_to_3_tuple_success():
-    c3t = cuda.core.experimental._utils.cuda_utils.cast_to_3_tuple
+    c3t = cuda.core._utils.cuda_utils.cast_to_3_tuple
     assert c3t("", ()) == (1, 1, 1)
     assert c3t("", 2) == (2, 1, 1)
     assert c3t("", (2,)) == (2, 1, 1)
@@ -43,7 +43,7 @@ def test_cast_to_3_tuple_success():
 )
 def test_cast_to_3_tuple_value_error(cfg, expected):
     with pytest.raises(ValueError, match=expected):
-        cuda.core.experimental._utils.cuda_utils.cast_to_3_tuple("Lbl", cfg)
+        cuda.core._utils.cuda_utils.cast_to_3_tuple("Lbl", cfg)
 
 
 def convert_strides_to_counts(strides, itemsize):