Clang tidy quality of life

[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

Small clang-tidy improvements:

• Print the warnings of clang-tidy for the CI
• Check for necessary env vars, this also prevents failing of the test when pushed to next happen.

Test plan

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Closing issues

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