[OpenMP] Add support for extracting device code in linker wrapper

This patchs add support for extracting device offloading code from the
linker's input files. If the file contains a section with the name
`.llvm.offloading.<triple>.<arch>` it will be extracted to a new
temporary file to be linked. Addtionally, the host file containing it
will have the section stripped so it does not remain in the executable
once linked.

Depends on D116544

Differential Revision: https://reviews.llvm.org/D116545