Fix CanBindToFormWithFiles (#57355)

Author: MackinnonBuck

src/Components/test/E2ETest/ServerRenderingTests/FormHandlingTests/FormWithParentBindingContextTest.cs

@@ -1596,7 +1596,7 @@ private void DispatchToFormCore(DispatchToForm dispatch)
             if (!dispatch.FormIsEnhanced)
             {
                 // Verify the same form element is *not* still in the page
-                Assert.Throws<StaleElementReferenceException>(() => form.GetAttribute("method"));
+                Browser.True(() => IsElementStale(form));
             }
             else if (!dispatch.SuppressEnhancedNavigation)
             {
@@ -1648,6 +1648,19 @@ private void GoTo(string relativePath)
         Navigate($"{ServerPathBase}/{relativePath}");
     }
 
+    private static bool IsElementStale(IWebElement element)
+    {
+        try
+        {
+            _ = element.Enabled;
+            return false;
+        }
+        catch (StaleElementReferenceException)
+        {
+            return true;
+        }
+    }
+
     private struct TempFile
     {
         public string Name { get; }