Infallible revoke of associated permissions on unregistering entities

[s8sato]

I don't think those revokes are currently expected to be infallible. For example, who CanUnregisterDomain can fail to revoke CanModifyDomainMetadata in visit_unregister_domain. Or we could consider this as a bug that should be eliminated in another issue, and make it panic or ValidationFail::InternalError

Originally posted by @s8sato in https://github.com/hyperledger-iroha/iroha/pull/5239#discussion_r1846842131