GitLab

- Added version number for python packes to the readme
- Added version number of jupyter-lab to readme

- Dependency for LSTM notebook

- Merge branch 'devel'

- Fail by default if not running on aarch64 (arm 64-bit)
- Fail by default if python version is not 3.9.x

- Add additional python dependencies
- Change tensorflow installed detection to not check for version 2.7 .
  Since tf is installed from file, it doesn't register as version 2.7

- Add task to check if tensorflow is installed alread
- Add script to download and install prebuilt wheel

- Lock jupyterlab to version 3.2.4
- Change venv tasks to execute as target_user
- Remove whitespaces
- Remove unneeded comments

- Moved `python3-pip` and `python3-venv` into local.yml as base dependencies
- Update apt cache while installing base dependencies in local.yml
- Remove redundant installs and cache updates from roles

- Python version check is set to allow 3.7.x - 3.9.x
- The version check can be disabled with the `ignore_python_version` variable
- The systemd service can be opt-out with `jupyter_service` variable

All mp packages and also jupyter are now installed into a venv.
This should avoid conflicts with global python packages.