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

[Sam James via llvm-commits]

thesamesam wrote:

IIRC the Clang behaviour for `-Wincompatible-pointer-types` differs from GCC as it includes qualifiers while GCC doesn't, so it may show up with some new failures. That's not a comment for or against changing it.

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