fix: for pooled memory used for reference types, clear it on return to the pool so that it doesn't prevent GC of the instances it contained (#6937)

src/Ryujinx.Common/Memory/SpanOwner.cs

@@ -108,7 +108,7 @@ namespace Ryujinx.Common.Memory
         [MethodImpl(MethodImplOptions.AggressiveInlining)]
         public void Dispose()
         {
-            ArrayPool<T>.Shared.Return(_array);
+            ArrayPool<T>.Shared.Return(_array, RuntimeHelpers.IsReferenceOrContainsReferences<T>());
         }
     }
 }