[llvm] [yaml2obj] Apply output size limit to Mach-O (PR #210027)

[James Henderson via llvm-commits]

jh7370 wrote:

There are a number of indications that suggest that this PR has been entirely AI generated, including the PR description, which would be a violation of the LLVM AI policy.

What motivated this PR?

https://github.com/llvm/llvm-project/pull/210027