[llvm] [SCEV][LAA] Support multiplication overflow computation (PR #155236)

[via llvm-commits]

annamthomas wrote:

CI:
Failed Tests (1):
  lldb-api :: functionalities/data-formatter/data-formatter-stl/generic/forward_list/TestDataFormatterGenericForwardList.py

Not related to this change.

https://github.com/llvm/llvm-project/pull/155236