[DMS] az dms project create: Add breaking change warning (#31759)

Author: temandr

src/azure-cli/azure/cli/command_modules/dms/_breaking_change.py

@@ -0,0 +1,7 @@
+# --------------------------------------------------------------------------------------------
+# Copyright (c) Microsoft Corporation. All rights reserved.
+# Licensed under the MIT License. See License.txt in the project root for license information.
+# --------------------------------------------------------------------------------------------
+from azure.cli.core.breaking_change import register_argument_deprecate
+
+register_argument_deprecate('dms project create', argument='location')