[clang] [CIR] Split CIR_UnaryOp into individual operations (PR #185280)

[Henrich Lauko via cfe-commits]

xlauko wrote:

### Merge activity

* **Mar 14, 8:28 PM UTC**: [Graphite](https://app.graphite.com/github/pr/llvm/llvm-project/185280) rebased this pull request as part of a merge.


https://github.com/llvm/llvm-project/pull/185280