[clang] [Clang] Allow -Wcast-function-type for same-width pointer-integer conversions (PR #178390)

[Aaron Ballman via cfe-commits]

AaronBallman wrote:

Btw, was this PR generated via an LLM in some part? If so, that should be disclosed explicitly as per our [AI policy](https://llvm.org/docs/AIToolPolicy.html).

https://github.com/llvm/llvm-project/pull/178390