message: bench: Fix execution benchmarks
  At least in wasm3 the function id points to existing runtime so
  find_function() can only be used after instantiate().
diff: @@ -148,12 +148,12 @@ void benchmark_execute(
  validate_benchmark_case(state, *engine, benchmark_case);
  const auto has_memory = !benchmark_case.memory.empty();
  - const auto func_ref = engine->find_function(benchmark_case.func_name);
  for ([[maybe_unused]] auto _ : state)
  {
  state.PauseTiming();
  engine->instantiate();
  + const auto func_ref = engine->find_function(benchmark_case.func_name);
  if (has_memory)
  engine->init_memory(benchmark_case.memory);
  state.ResumeTiming();
  