[clang] [CIR][NFC] Use `getType()` instead of more verbose `getResult().getType()` (PR #143024)

[Henrich Lauko via cfe-commits]

xlauko wrote:

### Merge activity

* **Jun 6, 7:57 AM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/143024).


https://github.com/llvm/llvm-project/pull/143024