AttributeError: 'dict' object has no attribute 'is_xml_model'

[vbehar]

Version

v4.17.0

Describe the bug

Sending a "feedback" to a bot in Teams generates the following error:

Traceback (most recent call last):
File "/.../.venv/lib/python3.12/site-packages/msrest/serialization.py", line 494, in _serialize
is_xml_model_serialization = kwargs["is_xml"]
~~~~~~^^^^^^^^^^
KeyError: 'is_xml'

During handling of the above exception, another exception occurred:

[...]

File "/.../.venv/lib/python3.12/site-packages/botbuilder/core/serializer_helper.py", line 40, in serializer_helper
return serializer._serialize(object_to_serialize)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "/.../.venv/lib/python3.12/site-packages/msrest/serialization.py", line 496, in _serialize
is_xml_model_serialization = kwargs.setdefault("is_xml", target_obj.is_xml_model())
^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'dict' object has no attribute 'is_xml_model'

To Reproduce

Steps to reproduce the behavior:

1. Install a python sample app from https://github.com/OfficeDev/microsoft-365-agents-toolkit
2. Run the bot, make it answer something
3. Try to send a feedback to the bot
4. See error

Expected behavior

no failure ;-)

Additional context

Original bug reports have been reported in the https://github.com/microsoft/teams-ai/ repo:

• [Bug]: adaptie cards search results causes AttributeError: 'dict' object has no attribute 'is_xml_model' teams-ai#2547
• [Dev support]: [Teams AI SDK - Python] Task Module invocation fails with error: "<BotError> Agent returned unsuccessful status code: InternalServerError" teams-ai#2510

The issue has been introduced in botbuilder-python v4.17.0 in this PR: #2226 - and more precisely in the cloud_adapter by using a serializer_helper on a dict - which has no 'is_xml_model' attribute: https://github.com/microsoft/botbuilder-python/pull/2226/files#diff-0de1897f504beeb3a3573d1e89fd20ad5d42a8a33d779b341e253527a638da07