[Fix] Call clip gradients if clip val greater than 0 (#6330)

* Call clip gradients if clip val greater than 0

* format

* Format

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Author: SeanNaren

tests/plugins/test_sharded_plugin.py

@@ -31,6 +31,10 @@ def test_ddp_sharded_precision_16_clip_gradients(mock_oss_clip_grad_norm, clip_v
         mock_oss_clip_grad_norm.assert_not_called()
 
 
+<<<<<<< HEAD
+=======
+@RunIf(fairscale=True)
+>>>>>>> d0e7ca36... [Fix] Call clip gradients if clip val greater than 0 (#6330)
 @pytest.mark.parametrize(["accelerator"], [("ddp_sharded", ), ("ddp_sharded_spawn", )])
 @pytest.mark.skipif(not _FAIRSCALE_AVAILABLE, reason="Fairscale is not available")
 def test_sharded_ddp_choice(tmpdir, accelerator):