[llvm] [NFC][CodeGen] Clang format MachineSink.cpp (PR #114027)

[Akshat Oke via llvm-commits]

optimisan wrote:

### Merge activity

* **Nov 14, 8:17 AM EST**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/114027).


https://github.com/llvm/llvm-project/pull/114027