[Bug]: proto2_coder_test_messages_pb2.py is not generated via gen_protos.py

[lukecwik]

What happened?

It looks like proto2_coder_test_messages_pb2.py was generated once a long time ago and is not being maintained automatically by gen_protos.py or any other part of the build system.

Issue Priority

Priority: 3

Issue Component

Component: sdk-py-core

[lukecwik]

CC: @anandolee