Misc performance tweaks (#4509)

* use Array.Empty() where instead of allocating new zero-length arrays

* structure for loops in a way that the JIT will elide array/Span bounds checking

* avoiding function calls in for loop condition tests

* avoid LINQ in a hot path

* conform with code style

* fix mistake in GetNextWaitingObject()

* fix GetNextWaitingObject() possibility of returning null if all list items have TimePoint == long.MaxValue

* make GetNextWaitingObject() behave FIFO behavior for multiple items with the same TimePoint

Ryujinx.Graphics.Vulkan/Queries/Counters.cs

@@ -17,7 +17,7 @@ namespace Ryujinx.Graphics.Vulkan.Queries
 
             _counterQueues = new CounterQueue[count];
 
-            for (int index = 0; index < count; index++)
+            for (int index = 0; index < _counterQueues.Length; index++)
             {
                 CounterType type = (CounterType)index;
                 _counterQueues[index] = new CounterQueue(gd, device, pipeline, type);