[llvm] [llvm-objcopy] Add possibility to verify .note section format (PR #90458)

[James Henderson via llvm-commits]

jh7370 wrote:

P.S. It would be worth waiting before landing this to allow for the pre-merge checks to finish, so that you can make sure any failures are unrelated to your change.

https://github.com/llvm/llvm-project/pull/90458