[llvm] [github][CIR] Add xlauko and andykaylor as CIR reviewers (PR #148852)

[Henrich Lauko via llvm-commits]

xlauko wrote:

### Merge activity

* **Jul 15, 4:08 PM UTC**: A user started a stack merge that includes this pull request via [Graphite](https://app.graphite.dev/github/pr/llvm/llvm-project/148852).


https://github.com/llvm/llvm-project/pull/148852