Fix test ordering: finish frame before destroying native texture

Move DestroyTestTexture after FinishRenderingCurrentFrame so bgfx::frame()
processes the texture creation command before the native resource is released.

Co-authored-by: Copilot <223556219+Copilot@users.noreply.github.com>

Author: bghgary

Apps/UnitTests/Source/Tests.ExternalTexture.D3D11.cpp

@@ -51,9 +51,9 @@ TEST(ExternalTexture, CreateForJavaScriptWithTextureArray)
     // Wait for CreateForJavaScript to complete.
     done.get_future().wait();
 
-    DestroyTestTexture(nativeTexture);
-
     update.Finish();
     device.FinishRenderingCurrentFrame();
+
+    DestroyTestTexture(nativeTexture);
 #endif
 }