feat(jans-auth-server): Add client claim `jansLastActive` and Auth Server JSON server property `PersistClientActivity`

It would be useful to know when a client was last active. For example, a domain may want to archive unused clients. For this reason, the server should be configurable to record the last activity at the token or authz endpoint.
* `jansLastActive` Client Claim - a date object recording last time the client was seen at the token or authz endpoint
* `PersistClientActivity` Auth Server JSON propety - boolean to write the current date to the client entity `jansLastActive` claim.

Mike: change it to LastAccessTime if that's already in use for another claim