[clang] [clang][analyzer] Support `PointerType` in `getCXXRecordDecl` for `ContainerModeling` (PR #87787)

[Balazs Benics via cfe-commits]

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

Looks clean to me, even though I haven't checked how the ContainerModeling checker works.

https://github.com/llvm/llvm-project/pull/87787