Remove deprecated code in the UI integration Tests section

[Flaurite]

Description

The page: https://docs.jmix.io/jmix/testing/ui-integration-tests.html

See the cause of deprecation: https://github.com/jmix-framework/jmix/issues/3157 Since the https://github.com/jmix-framework/jmix/issues/3350 tests works with both the deprecated method and the new one.

What should be fixed

From

viewNavigators.view(UserListView.class).navigate();

To

viewNavigators.view(UiTestUtils.getCurrentView(), UserListView.class).navigate();