QtCreator toolchain "re-detect" is using symlinks instead of real path

When QtCreator detects toolchains, it uses path with symlinks instead of real path.

Arch Linux has real `/usr/bin` directory, but `/bin` is a symlink to `usr/bin`. QtCreator finds compilers like `/bin/clang` instead of `/usr/bin/clang`.

Why is it bad? I noticed, when I use CMake+Clang+Ninja and clang path is `/bin/clang` instead of `/usr/bin/clang`, every build rebuilds almost entire program every time.

Maybe it's a clang bug (18.1.8 here, gcc seems to be working correctly), but I think it's more safe to take the real paths anyway.

Example difference between commands (first works bad, second works good):

cmake -B build -S . -GNinja -DCMAKE_C_COMPILER=/bin/clang -DCMAKE_CXX_COMPILER=/bin/clang++

cmake -B build -S . -GNinja -DCMAKE_C_COMPILER=/usr/bin/clang -DCMAKE_CXX_COMPILER=/usr/bin/clang++