Add support for Optional Content in TilingPatterns (issue 15716)

This can't be a particularly common feature, since we've supported Optional Content for over two years and this is the very first TilingPattern-case we've seen.

src/display/api.js

@@ -3245,7 +3245,7 @@ class InternalRenderTask {
       this.commonObjs,
       this.objs,
       this.canvasFactory,
-      optionalContentConfig,
+      { optionalContentConfig },
       this.annotationCanvasMap,
       this.pageColors
     );