[llvm] [FunctionComparator] Differentiate instructions passing distinct MDStrings (PR #69543)

[Duncan P. N. Exon Smith via llvm-commits]

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

LGTM, if you rephrase the subject of the commit and pull request to use "different" instead of "distinct" when referring to `MDString` (because of the language clash against distinct vs. uniqued in LLVM metadata).

https://github.com/llvm/llvm-project/pull/69543