ipatests: Fix UI_driver method after Selenium upgrade

`WebDriver.switch_to_active_element()` was deprecated in favour of
`driver.switch_to.active_element`.

Method was deprecated a long time ago, however deprecation message and
proxy method were removed recently and are not present in latest
version.

https://selenium-python.readthedocs.io/api.html#selenium.webdriver.remote.webdriver.WebDriver.switch_to_active_element
https://www.selenium.dev/selenium/docs/api/py/webdriver_remote/selenium.webdriver.remote.webdriver.html#selenium.webdriver.remote.webdriver.WebDriver.switch_to

Issue: https://pagure.io/freeipa/issue/9029

Signed-off-by: Armando Neto <abiagion@redhat.com>
Reviewed-By: Florence Blanc-Renaud <flo@redhat.com>

ipatests/test_webui/ui_driver.py

@@ -1057,7 +1057,7 @@ class UI_driver:
 
         # Chrome does not close search area on click
         if list_cnt.is_displayed():
-            self.driver.switch_to_active_element().send_keys(Keys.RETURN)
+            self.driver.switch_to.active_element.send_keys(Keys.RETURN)
 
         self.wait()