[llvm] [Liboffload] Add function for checking ELF file device compatibility (PR #156259)

[Jonas Greifenhain via llvm-commits]

cadivus wrote:

> ELF is too specific, just make it an image and let the runtime check if it's LLVM-IR, PTX, ELF, SPIR-V, whatever.

Thanks for your feedback! How would you do that since my goal here is to call the `isELFCompatible` function of the device plugin?

https://github.com/llvm/llvm-project/pull/156259