Fix detection of clang version on macOS for builtin TBB
Fix detection of clang version on macOS for builtin TBB

When CUDA is installed on macOS, clang -v prints also the
version of CUDA that is found, which breaks version detection.
As a workaround, clang --version prints the same information,
but without printing the CUDA version.

Fixes: ROOT-9678

karies/root,karies/root,olifre/root,olifre/root,root-mirror/root,karies/root,root-mirror/root,root-mirror/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root,olifre/root,root-mirror/root,karies/root,root-mirror/root,karies/root,root-mirror/root,olifre/root,karies/root,root-mirror/root,karies/root,olifre/root,karies/root,olifre/root,karies/root,olifre/root,karies/root,karies/root,root-mirror/root,root-mirror/root,olifre/root,olifre/root