[clang] [clang][analyzer] Remove array bounds check from PointerSubChecker (PR #102580)

[Donát Nagy via cfe-commits]

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

Thanks for the updates, I'm satisfied with the state of this commit. However let's wait for an independent approval from @steakhal @haoNoQ or someone else, because this change does reduce the scope of this checker.

https://github.com/llvm/llvm-project/pull/102580