Add clang-format test to CI

So a lot of cleanup commits can be omitted.

https://stackoverflow.com/questions/68174697/check-coding-style-with-gitlab-ci

format:
  stage: test
  image: nexus.lumiplan.com:8443/toolchain/clang-format:13
  needs: []
  script:
    - find rootToYourProject \( \( -name \*.cpp -o -name \*.h \) -a ! -iname \*soap\* \) -print0 | xargs -0 -n 1 clang-format-13 --Werror -n --verbose
  only:
    - merge_requests