[llvm] Revert "[llvm] Improve llvm.objectsize computation by computing GEP, alloca and malloc parameters bound" (PR #117020)

[via llvm-commits]

serge-sans-paille wrote:

> > Does #116955 fixes the issue instead?
> 
> Let's see: https://lab.llvm.org/buildbot/#/buildrequests/2114124?redirect_to_build=true

looks like the ref wasn't found by the bot - and it's bed time in my TZ

https://github.com/llvm/llvm-project/pull/117020