Use cleanup hook to reload django views

[mrbean-bremen]

• reload only the django view modules instead of all modules
• change the module cleanup mode default to always delete modules (avoiding problems with reloading other modules)
• should be a better fix for Tests failing with pyfakefs and django after first test #932

Tasks

• Unit tests added that reproduce the issue or prove feature is working - n/a
• Fix or feature added
• Entry to release notes added
• Pre-commit CI shows no errors
• Unit tests passing
• For documentation changes: The Read the Docs preview builds and looks as expected