Modern testing

[Rot127]

Your checklist for this pull request

• I've documented or updated the documentation of every API function and struct this PR changes.
• I've added tests that prove my fix is effective or that my feature works (if possible)

Detailed description

Modernize testing.

The new unit testing is build around yaml files. They can be consumed by the C test engine (cstest) or any bindings easily.

Statistics

The new cstest logs technically two statistics. One by cmocka and one by cstest.
The reason is:

1. We might want to group tests in the future (by arch or file for example) so we need a global statistics.
2. Errors of incorrect yaml parsing are not tracked by cmocka.
3. Also, cmocka doesn't provide the detailed statistics to us. So we cannot print a nice summary at the end.

Changes

• New cstest C-implementation
• New py_cstest Python-implementation
• Moves almost all tests to yaml files.
• Old tests which can't be moved (because they are effectively unit tests) are kept.
• Add numerous test jobs in the workflow
• Adds several CMake test targets
• Add LoongArch Python bindings
• Several bug fixes discovered during testing.

Todo

• Camel to snake case in cstest.
• No _set testing in Python code.

Test plan

Added and all green

Closing issues

closes #1984
closes #2405