Revert "[Transforms][IPO] Add func suffix in ArgumentPromotion and DeadArgume… (#105742)"
This reverts commit 959448fbd6bc6f74fb3f9655b1387d0e8a272ab8.
Reverting because multiple test failures e.g.
https://lab.llvm.org/buildbot/#/builders/187/builds/1290
https://lab.llvm.org/buildbot/#/builders/153/builds/9389
and maybe a few others.