What does this PR do?

Adds scripts that runs the CPU and GPU tests and calculates the test coverage.

General Changes

[ ] My PR is minimal and addresses one issue in isolation
[ ] I have merged the latest version of the target branch into this feature branch
[ ] I have reviewed my own code w.r.t. correct implementation, missing type hints, proper documentation, etc.
[ ] I have run a sample config for model training
[ ] I have checked that all tests run through (python tests/tests.py)
[ ] I have updated the internal changelog (CHANGELOG_DEV.md)