[PR #4871/1eee35df backport][stable-4] Disable opentelemetry installation for unit tests

[patchback]

This is a backport of PR #4871 as merged into main (1eee35d).

SUMMARY

Regularly CI (unit tests) is breaking because Protobuf for Python that's required by opentelemetry:

01:16 ______ ERROR collecting tests/unit/plugins/callback/test_opentelemetry.py ______
01:16 tests/unit/plugins/callback/test_opentelemetry.py:12: in <module>
01:16     from ansible_collections.community.general.plugins.callback.opentelemetry import OpenTelemetrySource, TaskData, CallbackModule
01:16 <frozen importlib._bootstrap>:991: in _find_and_load
01:16     ???
01:16 <frozen importlib._bootstrap>:975: in _find_and_load_unlocked
01:16     ???
01:16 <frozen importlib._bootstrap>:671: in _load_unlocked
01:16     ???
01:16 /root/ansible/lib/ansible/utils/collection_loader/_collection_finder.py:434: in exec_module
01:16     exec(code_obj, module.__dict__)
01:16 plugins/callback/opentelemetry.py:89: in <module>
01:16 E    1. Downgrade the protobuf package to 3.20.x or lower.
01:16 E    2. Set PROTOCOL_BUFFERS_PYTHON_IMPLEMENTATION=python (but this will use pure-Python parsing and will be much slower).
01:16 E   
01:16 E   More information: https://developers.google.com/protocol-buffers/docs/news/2022-05-06#python-updates

(Python 3.8 and 3.9)

See for example https://dev.azure.com/ansible/community.general/_build/results?buildId=45905&view=results

This is usually fixed after a couple of days, but this is really annoying me, so I'm going to disable these tests by removing the dependencies from tests/unit/requirements.txt.

ISSUE TYPE

• Test Pull Request

COMPONENT NAME

unit tests