[clang] [NFC][analyzer] Eliminate the NodeBuilder in VisitUnaryOperator (PR #211304)

[Gábor Tóthvári via cfe-commits]

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

The patch looks good to me.

The implicit insertions of `NodeBuilder` were made explicit and the `generateNode` calls were replaced with calls to the `makeNodeWithBinding`, `makePostStmtNode` methods. 

https://github.com/llvm/llvm-project/pull/211304