Handle redesigned root password screen in new anaconda

Really this just boils down to needing an extra click. We can
even just do the click in the old UI as well, it's not needed
but won't hurt anything and keeps the code simple.

Signed-off-by: Adam Williamson <awilliam@redhat.com>

needles/anaconda/install_process/root_password_screen-20210824.json

@@ -0,0 +1,21 @@
+{
+  "area": [
+    {
+      "ypos": 309,
+      "height": 15,
+      "type": "match",
+      "xpos": 266,
+      "width": 63,
+      "click_point": {
+        "xpos": 6.5,
+        "ypos": 7.5
+      }
+    }
+  ],
+  "properties": [],
+  "tags": [
+    "anaconda_install_root_password_screen",
+    "ENV-DISTRI-fedora",
+    "LANGUAGE-english"
+  ]
+}

tests/_do_install_and_reboot.pm

@@ -11,7 +11,10 @@ sub _set_root_password {
     my $root_password = get_var("ROOT_PASSWORD") || "weakpassword";
     unless (get_var("INSTALLER_NO_ROOT")) {
         assert_and_click "anaconda_install_root_password";
-        assert_screen "anaconda_install_root_password_screen";
+        # from anaconda-35.22.1 onwards, we have to click 'enable root
+        # account' before typing the password. For older versions,
+        # clicking this needle does nothing but is harmless
+        assert_and_click "anaconda_install_root_password_screen";
         # wait out animation
         wait_still_screen 2;
         desktop_switch_layout("ascii", "anaconda") if (get_var("SWITCHED_LAYOUT"));