fix some MKL detection issues of CMake (#94402)
This PR rewrites some logic of FindMKL.cmake and FindOpenMP.cmake to better detect the corresponding libraries and fix the infinitely recursion between them. It also contains some other fixes without changing the CMake interface.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/94402
Approved by: https://github.com/malfet, https://github.com/Skylion007
