kernels/moe test pruning (#27053)

Signed-off-by: Fardin Hoque <kfhfar@amazon.com>
Co-authored-by: Wentao Ye <44945378+yewentao256@users.noreply.github.com>

tests/kernels/moe/test_modular_kernel_combinations.py

@@ -295,6 +295,8 @@ def test_modular_kernel_combinations_singlegpu(
     world_size: int,
     pytestconfig,
 ):
+    """Note: float8_e4m3fn is not supported on CUDA architecture < 89,
+    and those tests will be skipped on unsupported hardware."""
     config = Config(
         Ms=Ms,
         K=k,
@@ -309,6 +311,12 @@ def test_modular_kernel_combinations_singlegpu(
         world_size=world_size,
     )
 
+    if (
+        quant_config is not None and quant_config.quant_dtype == torch.float8_e4m3fn
+    ) and not current_platform.has_device_capability(89):
+        pytest.skip(
+            "Triton limitation: fp8e4nv data type is not supported on CUDA arch < 89"
+        )
     verbosity = pytestconfig.getoption("verbose")
     run(config, verbosity > 0)