[llvm] [llvm-profdata] Do not create numerical strings for MD5 function names read from a Sample Profile. (PR #66164)

[via llvm-commits]

WenleiHe wrote:

This is a big change, and a somewhat intrusive one. Can you explain the motivation, the change itself and the results in more details? 

https://github.com/llvm/llvm-project/pull/66164