Turn @staticInterop tear-off into closure

@staticInterop members will start disallowing tear-offs, so this
member should turn into a closure.

The static check wasn't added in time, so this is modifying the
source code again.

Author: srujzs

lib/web_ui/lib/src/engine/text/font_collection.dart

@@ -130,7 +130,12 @@ class HtmlFontCollection implements FlutterFontCollection {
     }
 
     try {
-      fontFaces.forEach(domDocument.fonts!.add);
+      // Since we can't use tear-offs for interop members, this code is faster
+      // and easier to read with a for loop instead of forEach.
+      // ignore: prefer_foreach
+      for (final DomFontFace font in fontFaces) {
+        domDocument.fonts!.add(font);
+      }
     } catch (e) {
       return FontInvalidDataError(asset);
     }