Problem:
As part of the IP masking investigation we discussed that constraints still have a config (WBQualityConstraintsShowConstraintViolationToNonLoggedInUsers) that let's us turn them off for non-logged-in users. This was intended as a temporary measure in case showing them to non-logged-in users would have an adverse effect. We have had them shown for everyone now for quite a while and no issues have come up. Let's remove the config.
On this property page: https://www.wikidata.org/wiki/Property:P31 the property 'different from' has a constraint violation. The setting should be completely removed.
Config was introduced with this patch: https://gerrit.wikimedia.org/r/c/mediawiki/extensions/WikibaseQualityConstraints/+/874417
Acceptance criteria:
- config for limiting constraint violation warnings to logged-in users is removed