Add initial auto-generation support for streaming APIs

[amehra-ni]

What does this Pull Request accomplish?

This PR adds initial support for auto-generation of streaming APIs. This might not be complete, but we will be iteratively covering cases in follow-ups.

Why should this Pull Request be merged?

• Metadata Update: Enhanced the metadata for FPGA functions to include additional information regarding streaming. This updated metadata is utilized in the metadata_mutation.py to create streaming functions and integrate them into the original function list. list.
• Condition Check for Streaming API: Added condition checks in service.cpp.mako and other relevant files to generate streaming APIs. These checks invoke helper Mako files to generate the streaming function body.
  Struct Generation: First, generate the necessary structs for the streaming API.
  Moniker Functions: Next, generate the Moniker functions required for streaming.
  Function Generation: Finally, generate the streaming functions themselves.
• Service Helpers: Added logic in service_helpers.mako to auto-generate the streaming function bodies. The generated functions are designed to handle various parameter and streaming types, similar to the example provided here
• Proto Mako: Added support for including additional proto files in the proto.mako file.
• In a follow-up PR, plan to extract common helper methods that can be used by both the new and existing code. This iterative approach will enhance the auto-generation process to handle additional cases more effectively.

What testing has been done?

Both grpc-server and sideband server runs fine. I'm able to use the client code and call the server with all the new streaming APIs and talk with the VI.

[maxxboehme]

Both grpc and sideband servers runs fine.

Can you add more details about the testing done since no automated testing was added in the PR.