webdriver: Element click waits for navigation complete (#37935)

Step 11 in https://w3c.github.io/webdriver/#dfn-element-click

> [Try](https://w3c.github.io/webdriver/#dfn-try) to [wait for
navigation to
complete](https://w3c.github.io/webdriver/#dfn-wait-for-navigation-to-complete)
with session.

This fixes issue in which element_click triggers navigation, but
incoming commands still interact with old page.

Testing:
https://github.com/longvatrong111/servo/actions/runs/16175767947
https://github.com/longvatrong111/servo/actions/runs/16175770044

Signed-off-by: batu_hoang <longvatrong111@gmail.com>

components/script/script_thread.rs

@@ -2499,6 +2499,13 @@ impl ScriptThread {
                 reply,
                 can_gc,
             ),
+            WebDriverScriptCommand::IsDocumentReadyStateComplete(response_sender) => {
+                webdriver_handlers::handle_try_wait_for_document_navigation(
+                    &documents,
+                    pipeline_id,
+                    response_sender,
+                )
+            },
             _ => (),
         }
     }