[fenix] Disable/fix tests that rely on Select Tabs button

app/src/androidTest/java/org/mozilla/fenix/ui/SmokeTest.kt

@@ -1049,6 +1049,7 @@ class SmokeTest {
         }
     }
 
+    @Ignore("Feature is temporarily removed; disabling test. See https://github.com/mozilla-mobile/fenix/issues/18656")
     @Test
     fun selectTabsButtonVisibilityTest() {
         homeScreen {

app/src/androidTest/java/org/mozilla/fenix/ui/robots/TabDrawerRobot.kt

@@ -160,7 +160,10 @@ class TabDrawerRobot {
 
     fun clickTabMediaControlButton() = tabMediaControlButton().click()
 
-    fun clickSelectTabs() = onView(withText("Select tabs")).click()
+    fun clickSelectTabs() {
+        threeDotMenu().click()
+        onView(withText("Select tabs")).click()
+    }
 
     fun clickAddNewCollection() = addNewCollectionButton().click()