Add support for Response body generation in Compile time generation

[samvaity]

Key Changes

• Support for All ResponseBodyModes: This PR now includes support for all ResponseBodyModes (IGNORE, BUFFER, STREAM, DESERIALIZE).
• Optional RequestOptions: If RequestOptions are provided in the Service interface, they will be used instead of the default from httpRequest.getRequestOptions().
• Convenience Overloads: Added convenience methods in the Service interface, identified by the suffix "Convenience" and default modifier. Updated the generation to not generate for these methods as they have a provided default implementation that uses the corresponding *Response overload getValue().
• HttpRequest Updates: The HttpRequest class now uses setter methods instead of constructor arguments.
• HttpClientTests Cloning: Cloned HttpClientTests to transition from using RestProxy to using the Impl instance for service calls [As we go].
• ContentType: Removed ContentType usages as we don't need to update and release new versions whenever a new content type is added. Made internal in clientcore.
• Get Defaut ResponseBodyMode: Added a util method to retrieve the ResponseBodyMode from RequestOptions or use the default ResponseBodyMode.BUFFER.

Closes : #44038, #44150
Latest generated TestInterfaceClientServiceImpl

[azure-sdk]

API change check

API changes are not detected in this pull request.