[llvm] Extend llvm objdump fatbin (PR #114834)

[David Salinas via llvm-commits]

david-salinas wrote:

> Long term I think the offload bundles should go away entirely. If this really needs to exist, then at a minimum these need to share the same option. You can detect the format through the magic bits, no need for the confusion.

@yxsamliu any objections to just having the --offloading option, and dropping "--offload-fatbin"?  So, we would attempt to extract/dump Offload Fat Binaries with just --offloading.

https://github.com/llvm/llvm-project/pull/114834