Merge pull request #2211 from tsgcpp/feature/dispose_texture_cache_in_texturefactroy

TextureFactoryにて所有権が譲渡されていないTextureを破棄する

Assets/VRMShaders/GLTF/IO/Runtime/Texture/Importer/TextureFactory.cs

@@ -36,6 +36,10 @@ namespace VRMShaders
 
         public void Dispose()
         {
+            foreach (var (k, v) in _textureCache)
+            {
+                UnityObjectDestroyer.DestroyRuntimeOrEditor(v);
+            }
             _textureCache.Clear();
         }