refactor tidy github actions

[andiwand]

complexity of the tidy job increased because of conan. is it possible to work around that?

see

• https://blog.kitware.com/static-checks-with-cmake-cdash-iwyu-clang-tidy-lwyu-cpplint-and-cppcheck/
• https://gitlab.kitware.com/cmake/cmake/-/issues/18926
• https://www.kdab.com/clang-tidy-part-1-modernize-source-code-using-c11c14/