test: change the way of detecting tooltip due to changes in 24.2.0

(cherry picked from commit fcafb21)

Author: taefi

src/test/java/org/vaadin/addons/taefi/component/ToggleButtonGroupIT.java

@@ -281,12 +281,13 @@ private Optional<TestBenchElement> getTooltipFor(WebElement element) {
         if (tooltipId == null) {
             return Optional.empty();
         }
-        List<TestBenchElement> tooltips = $("vaadin-tooltip-overlay").all();
+        List<TestBenchElement> tooltips = $("vaadin-tooltip").all();
         if (tooltips.isEmpty()) {
             return Optional.empty();
         }
         return tooltips.stream()
-                .filter(testBenchElement -> testBenchElement.getAttribute("id").equals(tooltipId))
+                .map(tooltip -> tooltip.findElement(By.tagName("div")))
+                .filter(div -> div.getAttribute("id").equals(tooltipId))
                 .findFirst();
     }