Pin protobuf and grpcio-tools

[xjules]

Issue
Test for ert_documentation fails due to we need to have the older version of protobuf package.

 _EMPTY = _descriptor.Descriptor(
/prog/res/komodo/bleeding-py38-rhel7/root/lib64/python3.8/site-packages/google/protobuf/descriptor.py:313: in __new__
    _message.Message._CheckCalledFromGeneratedFile()
E   TypeError: Descriptors cannot not be created directly.
E   If this call came from a _pb2.py file, your generated code is out of date and must be regenerated with protoc 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.
E   If you cannot immediately regenerate your protos, some other possible workarounds are:
E    1. Downgrade the protobuf package to 3.20.x or lower.
E    2. Set PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python (but this will use pure-Python parsing and will be much slower).

Approach
Short description of the approach

Pre review checklist

• Added appropriate release note label
• PR title captures the intent of the changes, and is fitting for release notes.
• Commit history is consistent and clean, in line with the contribution guidelines.

Adding labels helps the maintainers when writing release notes. This is the list of release note labels.

[xjules]

Test ert please.

[lars-petter-hauge]

I think we should at the same time investigate how we can remove the pin as well

[xjules]

I think we should at the same time investigate how we can remove the pin as well

Yes, I think we should. Although, I guess this falls onto resinisght / rips.