chore: import upstream snapshot with attribution

deepspeed/model_implementations/transformers/ds_base.py

@@ -0,0 +1,15 @@
+# Copyright (c) Microsoft Corporation.
+# SPDX-License-Identifier: Apache-2.0
+
+# DeepSpeed Team
+
+import torch.nn as nn
+
+
+class DeepSpeedTransformerBase(nn.module):
+
+    def __init__(self):
+        pass
+
+    # this would be the new clean base class that will replace DeepSpeedTransformerInference.
+    # we currently don't know how this will look like but keeping it here as a placeholder.