[OpenMP] Using SimpleVLA to handle vla usage in ompt-general.cpp. (llvm#114583)

The `openmp` runtime failed to build on LoP with LLVM18 on LoP due to
the addition of `-Wvla-cxx-extension` as
```
llvm-project/openmp/runtime/src/ompt-general.cpp:711:15: error: variable length arrays in C++ are a Clang extension [-Werror,-Wvla-cxx-extension]
  711 |   int tmp_ids[ids_size];
      |               ^~~~~~~~
llvm-project/openmp/runtime/src/ompt-general.cpp:711:15: note: function parameter 'ids_size' with unknown value cannot be used in a constant expression
llvm-project/openmp/runtime/src/ompt-general.cpp:704:65: note: declared here
  704 | OMPT_API_ROUTINE int ompt_get_place_proc_ids(int place_num, int ids_size,
      |                                                                 ^
1 error generated.
```

This patch is to ignore the checking against this usage.

Author: DanielCChen

openmp/runtime/src/ompt-general.cpp

@@ -10,10 +10,11 @@
 //
 //===----------------------------------------------------------------------===//
 
+#include "kmp_utils.h"
+
 /*****************************************************************************
  * system include files
  ****************************************************************************/
-
 #include <assert.h>
 
 #include <stdint.h>
@@ -708,7 +709,7 @@ OMPT_API_ROUTINE int ompt_get_place_proc_ids(int place_num, int ids_size,
   return 0;
 #else
   int i, count;
-  int tmp_ids[ids_size];
+  SimpleVLA<int> tmp_ids(ids_size);
   for (int j = 0; j < ids_size; j++)
     tmp_ids[j] = 0;
   if (!KMP_AFFINITY_CAPABLE())