Revert "[msan] Fix-forward avx512-intrinsics-upgrade.ll (llvm#124495)"

This reverts commit a6044a0.

Reason: buildbot breakage
(https://lab.llvm.org/buildbot/#/builders/144/builds/16636/steps/6/logs/FAIL__LLVM__avx512-intrinsics-upgrade_ll)

Author: thurstond