Add streaming API for remaining FPGA functions.

[amehra-ni]

What does this Pull Request accomplish?

This PR adds support for the remaining FPGA APIs.

Why should this Pull Request be merged?

• Added necessary message in custom_proto.
• Updated functions.py list with the leftover functions.
• Updated to ${streaming_type} value {}; (as done for normal functions )such that it fits all datatype initialization.
• Initialize vector properly as when we call array_storage.data(), it returns a pointer to the underlying array, but since the vector is empty, this pointer is not valid for writing. Hence, initialize it properly now with the size.
• Updated the ownership transfer of the pointer using release() now for the data variable.

What testing has been done?

Streaming functions get called correctly, and the data is read/written correctly. This is one example where I read/write data in an indicator in the loop. (I have tested this for normal i32 type, but it will still work for other types as implementation is same internally) This is for scaler.

This is for array.