[clang] [Clang][NFC] Refactor `Targets.h` to make it publicly accessible (PR #116090)

[Bruno Cardoso Lopes via cfe-commits]

https://github.com/bcardosolopes approved this pull request.

This makes total sense to me. You should probably wait for more stamps here, but LGTM

https://github.com/llvm/llvm-project/pull/116090