What is needed to use Python with protobuf v4?

[simorgh-ahura]

When using the Python dependency of protobuf v4 and generate the proto/gRPC code with rules_proto_grpc via bazel. I get the following error:

If this call came from a `_pb2.py`  file, your generated code is out of date and must be regenerated with `protoc >= 3.19.0`.
If you cannot immediately regenerate your protos, some other possible workarounds are:

1. Downgrade the `protobuf` package to `3.20.x` or lower
2. Set `PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python` (but this will use pure-Python parsing and will be much slower).

Are there any plans to support protobuf v4 (which builds upon upb)?