[clang] [llvm] [OpenMP] Remove 'libomptarget.devicertl.a' fatbinary and use static library (PR #126143)

[Nikita Popov via cfe-commits]

nikic wrote:

A naive question from someone who is not familiar with this area: Is any of this stuff usable with anything but a matching version of clang? If no, can we place these things in the clang resource directory, where the other version-bound runtimes live?

https://github.com/llvm/llvm-project/pull/126143