[OpenMP] Using `SimpleVLA` to handle vla usage in ompt-general.cpp. (#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.
llvm-project
d3d8103d - [OpenMP] Using `SimpleVLA` to handle vla usage in ompt-general.cpp. (#114583)
