[OpenMP] Fix assert fail with user thread limit

[doru1004]

Summary

Fix assert fail with user thread limit to ensure the assert fail doesn't trigger when a user value is specified. Values given by the user are not guaranteed to satisfy the old assert condition.
Fixes: https://reviews.llvm.org/D158802

[doru1004]

Commit: 2102ed0b917bb29832543b78f667fa48c4c4c517

openmp/libomptarget/plugins-nextgen/common/PluginInterface/PluginInterface.cpp

if (isSPMDMode()) {
       MinThreads = std::min(MinThreads, NumThreads);
 
       // Honor the thread_limit clause; only lower the number of threads.
       [[maybe_unused]] auto OldNumThreads = NumThreads;
       if (LoopTripCount >= DefaultNumBlocks * NumThreads ||
           IsNumThreadsFromUser) {
         // Enough parallelism for teams and threads.
         TripCountNumBlocks = ((LoopTripCount - 1) / NumThreads) + 1;
-        assert(TripCountNumBlocks >= DefaultNumBlocks &&
+        assert(IsNumThreadsFromUser ||
+               TripCountNumBlocks >= DefaultNumBlocks &&
                    "Expected sufficient outer parallelism.");
       } else if (LoopTripCount >= DefaultNumBlocks * MinThreads) {
         // Enough parallelism for teams, limit threads.
 
         // This case is hard; for now, we force "full warps":
         // First, compute a thread count assuming DefaultNumBlocks.
         auto NumThreadsDefaultBlocks =
             (LoopTripCount + DefaultNumBlocks - 1) / DefaultNumBlocks;
         // Now get a power of two that is larger or equal.