[llvm] [llvm][tools] Add support to llvm-offload-binary to unbundle spirv64-intel images (PR #184774)

[Joseph Huber via llvm-commits]

https://github.com/jhuber6 commented:

This is a welcome improvement, but I am a little concerned at the Intel specific logic here. I forget why Intel needed so many custom sections, and I think including them here is a bit of a layering violation. Could you remind me what these sections actually do?

Though I do know that forcing users to use `llvm-objcopy` themselves isn't exactly user friendly. 

https://github.com/llvm/llvm-project/pull/184774