[clang] [clang-tools-extra] [compiler-rt] [lldb] [Clang] [Sema] Make `-Wincompatible-pointer-types` an error by default (PR #157364)

[via llvm-commits]

Sirraide wrote:

> > This seems to have broken several tests several tests in the LLDB test suite: https://green.lab.llvm.org/job/llvm.org/view/LLDB/job/as-lldb-cmake/33215/
> 
> Weird, I’m pretty sure I ran the LLDB tests locally and didn’t observe any errors; I’m looking into it.

Should be fixed by #158756.

https://github.com/llvm/llvm-project/pull/157364