[clang] [OpenACC] Implement Sema work for OpenACC Clauses (PR #87821)

[Vlad Serebrennikov via cfe-commits]

================
@@ -12252,6 +12252,8 @@ def warn_acc_clause_unimplemented
 def err_acc_construct_appertainment
     : Error<"OpenACC construct '%0' cannot be used here; it can only "
             "be used in a statement context">;
+def err_acc_clause_appertainment
+    : Error<"OpenACC '%1' clause not valid on '%0' directive">;
----------------
Endilll wrote:

```suggestion
    : Error<"OpenACC '%1' clause is not valid on '%0' directive">;
```

https://github.com/llvm/llvm-project/pull/87821