Add bandit scan to github workflow

[UlrichB22]

Used a customized copy of the action.yml from https://github.com/PyCQA/bandit-action.

The use of bandit-action was not possible because it uses Python 3.9. Reading the configuration in pyproject.toml requires an additional installation step for toml. This tool is integrated in Python since 3.11. If bandit-action raises the Python version, we can switch to bandit-action later.

Bandit results do not abort the workflow, it is terminated with success. The results are imported into the github security area using a sarif file. This area is protected and not publicly accessible. Tested with branch name 'test-github-action'.

[github-advanced-security]

This pull request sets up GitHub code scanning for this repository. Once the scans have completed and the checks have passed, the analysis results for this pull request branch will appear on this overview. Once you merge this pull request, the 'Security' tab will show more code scanning analysis results (for example, for the default branch). Depending on your configuration and choice of analysis tool, future pull requests will be annotated with code scanning analysis results. For more information about GitHub code scanning, check out the documentation.