[LibTorch] Fix `append_whole_archive` macro (#103348)
`-force_load` is not compiler, but a linker option, and as such should depend on the platform (i.e. MacOS/iOS), rather than on compiler (i.e. clang vs gcc)
Otherwise, attempt to link libtorch static with clang results in a cryptic `/usr/bin/ld: -f may not be used without -shared` error on Linux.
Pull Request resolved: https://github.com/pytorch/pytorch/pull/103348
Approved by: https://github.com/seemethere
