[llvm] Add llvm-extract-bundle-entry to extend llvm-objcopy (PR #169386)

[David Salinas via llvm-commits]

david-salinas wrote:

@jh7370 This is a replacement/rework to the other llvm-objcopy PR (https://github.com/llvm/llvm-project/pull/143347) I have.  This allows us to have a llvm-objcopy command that only requires/accepts a URI argument and does not require a change in llvm-objcopy to disable the Positional (an input file) requirement.

https://github.com/llvm/llvm-project/pull/169386