Deprecate system_list_reset()

Problem/Motivation

Now that system lists are all services system_list_reset() is pointless. Once the container is rebuilt the lists are reset.

The system_list() function is already deprecated.

Proposed resolution

Deprecate the method. If contrib or custom is using it and its functionality is really required they can either rebuild the container or call each \Drupal::service('extension.list.TYPE')->reset() as necessary.

Remaining tasks

User interface changes

None

API changes

Deprecate system_list_reset()

Data model changes

None

Release notes snippet

None