[5.2][RFC] CMSPlugin: DynamicSubscriberInterface as replacement for deprecated registerListeners

[Fedik]

Summary of Changes

A replacement for deprecated registerListeners() (see #43395)

Current limitation of SubscriberInterface is that it does not allow to return listeners depend from runtime.
It has own pros and cons. However in CMS it is sometimes need to have a diffrenet listeners depend from the Application type.

I think DynamicSubscriberInterface will be a good for it.
The difference from SubscriberInterface is that it uses non-static method, which allows subscriber to configure listeners depending on runtime. Additionally, it supports callables.

Testing Instructions

Code review.
Check GuidedTours and ScheduleRunner plugins still works.

Actual result BEFORE applying this Pull Request

Works

Expected result AFTER applying this Pull Request

Works

Link to documentations

Please select:

• Documentation link for docs.joomla.org:
• No documentation changes for docs.joomla.org needed
• Pull Request link for manual.joomla.org: TBD
• No documentation changes for manual.joomla.org needed

References:

• [5.2] CMSPlugin: deprecation for registerListeners #43395
• [5.2] CMSPlugin: Deprecate use of DispatcherAware and LanguageAware #43430