Reduce error to warning to prevent debugbreaks

renderdoc/driver/ihv/nv/nv_vk_counters.cpp

@@ -50,7 +50,7 @@ struct NVVulkanCounters::Impl
   {
     if(!NVCounterEnumerator::InitializeNvPerf())
     {
-      RDCERR("NvPerf library failed to initialize");
+      RDCWARN("NvPerf library failed to initialize");
       LibraryNotFound = true;
 
       // NOTE: Return success here so that we can later show a message