[CI/Build][AMD] Skip quantization kernels tests that require CUTLASS or e4m3fn when not supported by platform (#30020)

Signed-off-by: Randall Smith <ransmith@amd.com>
Co-authored-by: Randall Smith <ransmith@amd.com>

tests/kernels/quantization/test_cutlass_w4a8.py

@@ -21,6 +21,9 @@ from vllm.model_executor.layers.quantization.utils.quant_utils import (
 from vllm.platforms import current_platform
 from vllm.scalar_type import ScalarType, scalar_types
 
+if not current_platform.is_cuda():
+    pytest.skip("These tests use CUTLASS which requires CUDA", allow_module_level=True)
+
 # TODO: in future PR refactor this and `is_quant_method_supported` in the kernel
 #  unit tests to a common utility function. Currently the use of
 #  `is_quant_method_supported` conflates kernels with quantization methods