[llvm] [llvm] Use computeConstantRange to improve llvm.objectsize computation (PR #114673)

[Jan Patrick Lehr via llvm-commits]

jplehr wrote:

> LLVM Buildbot has detected a new failure on builder `clang-hip-vega20` running on `hip-vega20-0` while building `llvm` at step 3 "annotate".

This breakage may be related to the change. The bot has since not recovered and the previously flaky test got disabled.
can you take a look?

https://github.com/llvm/llvm-project/pull/114673