[Hardware][AMD][CI][Bugfix] Fix AMD Quantization test group (#31713)

Signed-off-by: Matthew Wong <Matthew.Wong2@amd.com>

tests/quantization/test_compressed_tensors.py

@@ -644,6 +644,9 @@ def test_compressed_tensors_2of4_sparse_compressed(vllm_runner, args_2of4):
         assert output
 
 
+@pytest.mark.skipif(
+    not current_platform.is_cuda(), reason="This test is skipped on non-CUDA platform."
+)
 @pytest.mark.parametrize(
     "args",
     [
@@ -762,7 +765,10 @@ def test_compressed_tensors_fp8_block_enabled(vllm_runner):
 
             input_quant_op = qkv_proj.scheme.w8a8_block_fp8_linear.input_quant_op
             assert isinstance(input_quant_op, QuantFP8)
-            assert input_quant_op._forward_method == input_quant_op.forward_cuda
+            assert input_quant_op._forward_method in (
+                input_quant_op.forward_cuda,
+                input_quant_op.forward_hip,
+            )
 
         llm.apply_model(check_model)