Documentation in https://doc.ezplatform.com/en/latest/guide/content_rendering/#content-and-location-view-providers refers to viewLocation/viewContent (and, related to View\Provider\Content, View\Provider\Location), which have been deprecated since kernel 6.0.0.

The doc needs to be updated with recommended up-to-date solutions and reworked as to which information is actually valuable for the developer.

This is a follow-up to https://jira.ez.no/browse/EZP-27919