Add new filters to private access token API

Proposal

The API calls to retrieve the private access token (PAT) are currently very limited. Users can only retrieve a list of their PATs. Administrators only have the possibility to filter for a specific user via the parameter user_id. To filter the desired PATs according to certain criteria more quickly, some filter parameters would be very useful. Following a table with possible parameters and their function

Name	Parameter	Explanation
Is revoked	revoked=[true, false]	All PATs where state matches parameter
Created before	created_before=[yyyy-mm-ddThh:mm:ss] If the date is specified but not the time, the default value of 00:00:00 is taken.	All PATs which were created before given datetime
Created after	created_after=[yyyy-mm-ddThh:mm:ss] If the date is specified but not the time, the default value of 00:00:00 is taken.	All PATs which were created after given datetime
By scopes	scopes=[api, read_api, read_user, read_repository, write_repository, sudo]	Filters PATs matching a comma-separated list of scopes (permission levels granted to the token)
By Name	search=[name]	Filters PATs by its name or a fraction of its name
Last used before	last_used_before=[yyyy-mm-ddThh:mm:ss] If the date is specified but not the time, the default value of 00:00:00 is taken.	Filters PATs which were used before the given datetime
Last used after	last_used_after=[yyyy-mm-ddThh:mm:ss] If the date is specified but not the time, the default value of 00:00:00 is taken.	Filters PATs which were used after the given datetime
Is active	active=[true, false]	Filters PATs which are either active or not

The user should merge the filters as desired by linking them with a ‘&’. e.g.

Filter all PATs which are inactive and were created before 10.12.2021 09:00:05 am

[GET api/v4/personal_access_tokens?active=false&created_before=2021-12-10T09:00:05]