[clang] [mlir] [CIR][OpenMP] Initial implementation of target region support (PR #195452)

[Sergio Afonso via cfe-commits]

================
@@ -6,90 +6,140 @@
 //
 //===----------------------------------------------------------------------===//
 //
-// Emit OpenMP clause nodes as CIR code.
+// OpenMP clause emitter implementation. See CIRGenOpenMPClause.h.
----------------
skatrak wrote:

Nit: This seems like AI over-documentation. Feel free to ignore if it was intentional.
```suggestion
// OpenMP clause emitter implementation.
```

https://github.com/llvm/llvm-project/pull/195452