[clang] [clang] Introduce `SemaOpenMP` (PR #88642)

[Alexey Bataev via cfe-commits]

================
@@ -997,6 +987,11 @@ class Sema final : public SemaBase {
     return *OpenACCPtr;
   }
 
+  SemaOpenMP &OpenMP() {
----------------
alexey-bataev wrote:

```suggestion
  SemaOpenMP &getOpenMP() {
```


https://github.com/llvm/llvm-project/pull/88642