420 feature implement database using test oep environment

[joda9]

Description

This PR will load all the data from the toep database. The table names are loaded via the dictionary so the names are still found in the code and are translated to the table numbers in the oep.

Fixes #420

Type of change

Please delete options that are not relevant.

• Bug fix (non-breaking change which fixes an issue)
• New feature (non-breaking change which adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)

Checklist:

• New and adjusted code is formatted using the pre-commit hooks
• New and adjusted code includes type hinting now
• I have commented my code, particularly in hard-to-understand areas
• I have made corresponding changes to the documentation
• I have added tests that prove my fix is effective or that my feature works
• New and existing unit tests pass locally with my changes
• The Read the Docs documentation is compiling correctly
• If new packages are needed, I added them the setup.py, and if needed the rtd_requirements.txt, the eDisGo_env.yml and the eDisGo_env_dev.yml.
• I have added new features to the corresponding whatsnew file

[khelfen]

Hey, looks good! I just added two little comments. I'm not sure if they make any sense, so feel free to ignore them if they don't :D Also, you can proceed with the merge after checking them out.