[llvm] [llvm-objcopy] Add --skip-symbol and --skip-symbols options (PR #80873)

[James Henderson via llvm-commits]

https://github.com/jh7370 approved this pull request.

LGTM, thanks. The buildkite failures appear to be unrelated, so feel free to merge.

https://github.com/llvm/llvm-project/pull/80873