deserialization issue following moving to new requests and responses

[iscai-msft]

Search is running into issues deseiralizing following our pr moving over to new requests and responses. The issue isn't the new requests and responses, the issue is that we are now only deserializing with pipeline_response.http_response instead of pipeline_response. Roll back part of this change, because we don't want to modify core behavior. This is in search

cc @xiangyan99

[msyyc]

I infer search SDK is generated with cmd autorest D:\dev\azure-rest-api-specs\specification\search\data-plane\Azure.Search\readme.md --python --python-sdks-folder=D:\dev\azure-sdk-for-python\sdk --use=@autorest/python@6.14.0 --use=@autorest/modelerfour@4.27.0 --version=3.10.2 --version-tolerant=False --tag=package-2021-04-searchindex-preview

[msyyc]

We have test cover this scenario

autorest.python/packages/autorest.python/test/vanilla/legacy/Expected/AcceptanceTests/BodyInteger/bodyinteger/operations/_int_operations_operations.py

Line 401 in 029547c

deserialized = self._deserialize("int", pipeline_response.http_response)

and I can't reproduce the deserialization issue. Could you provide more details about the issue? @iscai-msft @xiangyan99