[llvm] [llvm][profdata][NFC] Support 64-bit weights in ProfDataUtils (PR #86607)

[Matthias Braun via llvm-commits]

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

Ah ok, if this is just for convenience / consistency then fine with me. LGTM, thanks

https://github.com/llvm/llvm-project/pull/86607