[REQ] Improve protobuf generator by adding custom options for api and model files

[andrewwilsonnew]

Is your feature request related to a problem? Please describe.

Our project requires custom options in the proto api and model files.

Describe the solution you'd like

Can define 2 new options in the protobuf generator:

• customOptionsApi
• customOptionsModel

#21075

Describe alternatives you've considered

n/a

Additional context

Some good options that you can provide include:

• option cc_generic_services = true; # C++
• option optimize_for = SPEED;

java options see here

• option java_multiple_files = true;
• option java_package = "com.example.tutorial.protos.api";
• option java_outer_classname = "ExampleProtos";