Reverted Python to v3.x working for pre-commit

[ppatierno]

We started to face the following issue when running the pre-commit action:

error: externally-managed-environment

× This environment is externally managed
╰─> To install Python packages system-wide, try apt install
    python3-xyz, where xyz is the package you are trying to
    install.
    
    If you wish to install a non-Debian-packaged Python package,
    create a virtual environment using python3 -m venv path/to/venv.
    Then use path/to/venv/bin/python and path/to/venv/bin/pip. Make
    sure you have python3-full installed.
    
    If you wish to install a non-Debian packaged Python application,
    it may be easiest to use pipx install xyz, which will manage a
    virtual environment for you. Make sure you have pipx installed.
    
    See /usr/share/doc/python3.12/README.venv for more information.

note: If you believe this is a mistake, please contact your Python installation or OS distribution provider. You can override this, at the risk of breaking your Python installation or OS, by passing --break-system-packages.
hint: See PEP 66[8](https://github.com/strimzi/strimzi-kafka-operator/actions/runs/11349857009/job/31569820324?pr=10720#step:4:10) for the detailed specification.
Error: Process completed with exit code 1.

There are several issues on the pre-commit repo explaining that it's related to latest upgrades to Debian/Ubuntu managing Python version and conflicting with what pre-commit needs, which is Python v3.
This PR tries to fix the issue by changing the setup-python action moving from current v5 to a v3.1.4