[llvm] [NFC] `clang-format` GenericDomTreeConstruction.h (PR #182509)

[Mircea Trofin via llvm-commits]

mtrofin wrote:

### Merge activity

* **Feb 20, 4:53 PM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.com/github/pr/llvm/llvm-project/182509).


https://github.com/llvm/llvm-project/pull/182509