[OpenMP][Tools] Fix handling of initial-task-end

Latest OpenMP spec says parallel_data is NULL for initial/implicit-task-end. We nevertheless need to cleanup the ParallelData here, as there is no other callback for the end of the implicit parallel region. We can use the reference stored in the TaskData. Reviewed By: dreachem Differential Revision: https://reviews.llvm.org/D114005

Author: jprotze

openmp/tools/archer/ompt-tsan.cpp

@@ -686,10 +686,10 @@ static void ompt_tsan_implicit_task(ompt_scope_endpoint_t endpoint,
 #endif
  assert(Data->RefCount == 1 &&
  "All tasks should have finished at the implicit barrier!");
- Data->Delete();
  if (type & ompt_task_initial) {
- ToParallelData(parallel_data)->Delete();
+ Data->Team->Delete();
  }
+ Data->Delete();
  TsanFuncExit();
  break;
  }