People: Faces tagged on private or archived pictures should be ignored

[lastzero]

As a user who has people tagged on private and/or archived pictures, I do not want them to be counted, used as cover images or displayed when I click on the cover/person.

Related Issues:

• Albums: Ignore public filter if "Private" feature is disabled in Settings #2570 (comment)
• Albums: Add "Set as Album Cover" action to change the cover #383 (comment)
• People: Select a photo to use for a person's face #4151
• People: New face cannot be named due to invalid file or photo UID #4221

[lastzero]

An updated development preview build will be available for testing soon. Especially the performance should be closely observed, since the queries are now much more complex than before.