[llvm] [llvm-profdata] Reintroduce use of InitLLVM (PR #164736)

[Prabhu Rajasekaran via llvm-commits]

Prabhuk wrote:

@tcreech-intel -- As @petrhosek mentioned, I am working on porting llvm-profdata to OptTable so that it can be added back to the llvm driver though its a bit low on my priorities right now. Will it be alright with you if I remove this InitLLVM call when I make llvm-profdata part of the llvm-driver again?

cc: @mingmingl-llvm 

https://github.com/llvm/llvm-project/pull/164736