[llvm] [LLVM-Reduce] - Distinct Metadata Reduction (PR #104624)

[Robert Barinov via llvm-commits]

rbintel wrote:

@arsenm This is the replacement PR for [96072](https://github.com/llvm/llvm-project/pull/96072), addressed the issues which you pointed out in the review.

https://github.com/llvm/llvm-project/pull/104624