As a follow-up to #8971, this PR removes all references to the old Zope interfaces, except the ones used to deprecate them and prepare for their removal.
In the process, some documentation and tests about the `Display` objects are simply removed since they are not relevant anymore given that they are removed from the public API.
* Cleanup some interfaces.IInstaller
* Cleanup IConfig doc
* Allmost complete removal
* Remove useless tests
* Fixes
* More cleanup
* More cleanup
* More cleanup
* Remove a non existent reference
* Better type
* Fix lint