Turn on clang tidy readability-identifier-naming (partially)

[marchdf]

Summary

Turn on clang tidy readability-identifier-naming. Basically enforcing https://exawind.github.io/amr-wind/developer/coding_guidelines.html#style-guide-recommendations.

Not doing functions, variables, and globals yet. Those will come in other PRs to make these manageable.

Pull request type

Please check the type of change introduced:

• [ ] Bugfix
• [ ] Feature
• [x] Code style update (formatting, renaming)
• [ ] Refactoring (no functional changes, no api changes)
• [ ] Build related changes
• [ ] Documentation content changes
• [ ] Other (please describe):

Checklist

This PR was tested by running:

• the unit tests
  • [x] on GPU
  • [X] on CPU
• the regression tests
  • [ ] on GPU
  • [X] on CPU