[OpenMP][Tests] Flag compatibility of OpenMP runtime tests with GCC versions

If the compilation fails, the test is marked as unsupported.
-> This will never change for a specific version of gcc

If the linking fails, the test is marked as expected to fail.
-> This might change as LLVM/OpenMP implements the missing GOMP interface function

Reviewed by: Hahnfeld

Differential Revision: https://reviews.llvm.org/D83077