[llvm] [GlobalMerge] Add MinSize feature to the GlobalMerge Pass. (PR #93686)

[Philip Reames via llvm-commits]

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

LGTM - I think we can probably do better here for small data, but this seems like an entirely reasonable stepping stone.

https://github.com/llvm/llvm-project/pull/93686