Move to the clang-format binary instead of using the clangFormat library

For the C++ code model we moved away from the C libclang library to the clangd standalone executable.

We need to do the same thing with the clang-format binary which is shipped with Qt Creator installer already, alongside clangd.

This will remove the constraint of shipping a clangFormat library for all the compilers we support.

For Windows the MinGW clangd binaries are used for the Windows installer because they are faster. But we need to ship both MinGW and MSVC llvm prebuild binaries only due to clangFormat.