[clang] [NFC][analyzer] Remove NodeBuilders in ObjC logic (PR #202709)

[Donát Nagy via cfe-commits]

NagyDonat wrote:

I rephrased the PR title and description to account for the fact that https://github.com/llvm/llvm-project/commit/236f63474d40850a33fd4bcc6d8d63a31cebb8f1 was merged just now.

https://github.com/llvm/llvm-project/pull/202709