Simplify and clarify local python usage

[mkleszcz]

Description

In the requirements we have listed Python version 3.8 which does not fit with the used version in the docker images (3.11) and workers (3.9).

Describe the solution you'd like

We need to clarify if and which version of the Python is required locally. The only case in which Python might be required currently is the situation of the adding/updating Python packages. Would be good to simplify this process (maybe use only Python in Docker container?) and describe it in the docs.

• [x] Update requirements
• [ ] Document how to manage Python dependencies

Related to #362

Describe alternatives you've considered

No response

Additional context

No response

Validations

• [X] Follow our Code of Conduct.
• [X] Read the Contributing Guidelines.
• [X] Read the docs.
• [X] Check that there isn't already an issue that request the same feature to avoid creating a duplicate.

[mkleszcz]

Updated requirements with the #371 #358