BeforeEvent#getNavigationTarget() should return Class<? extends Component> #23221
Description
Describe your motivation
The navigation target returned by the BeforeEvent returns a generic Class<?>. Since the navigation target in Flow applications is always a Component, this does not make sense and requires the dev to add an unnecessary cast to Class<Component> (or <? extends Component>`) plus suppressed warnings.
Describe the solution you'd like
BeforeEvent#getNavigationTarget() should return Class<? extends Component>` instead.
Additional context
Since this might be a breaking change, it most likely is something for V26, but could be considered for an implementation in a minor, since current usages most likely will have a cast applied or are already assigned to a Class<?> variable.