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

[Nick Sarnie via cfe-commits]

sarnex wrote:

> FYI you'll probably need to make the weird spir-v linker tool handle static libraries. It's really easy since you just need to iterate over the archive members since I doubt we care about real symbol resolution here.

sounds good, im planning to open a pr to start building the devicertl for spir-v soon, probably after this is merged, so ill deal with it then

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