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

[Corentin Jabot via cfe-commits]

https://github.com/cor3ntin approved this pull request.

LGTM but let's see if other people have opinions in the next few days.
That GCC did it first and did not get pushback is reassuring

@erichkeane

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