ignore removed addtl props (Azure#41389)

Co-authored-by: catalinaperalta <[email protected]>

Author: catalinaperalta

scripts/breaking_changes_checker/breaking_changes_allowlist.py

@@ -19,6 +19,7 @@
         # Changes due to latest dpg design + need to support overloads in this tool
         ("ChangedParameterOrdering", "*", "*", "__init__"),
         # Changes due to latest dpg design
+        ("RemovedOrRenamedInstanceAttribute", "*", "*", "additional_properties"),
         ("RemovedOrRenamedClass", "*", RegexSuppression(".*ListResult$")),
         ("ChangedParameterKind", "*", "*", "*", "top"),
         ("ChangedParameterKind", "*", "*", "*", "filter"),