Add sessions and refresh tokens to Users Management API

[jak]

Changes

Adds support for the following APIs:

• https://auth0.com/docs/api/management/v2/users/get-refresh-tokens-for-user
• https://auth0.com/docs/api/management/v2/users/delete-refresh-tokens-for-user
• https://auth0.com/docs/api/management/v2/users/get-sessions-for-user
• https://auth0.com/docs/api/management/v2/users/delete-sessions-for-user

These APIs only support the checkpoint pagination so I've added a different filter for them.

References

Fixes #653

Testing

Please describe how this can be tested by reviewers. Be specific about anything not tested and reasons why. If this library has unit and/or integration testing, tests should be added for new functionality and existing tests should complete without errors.

• [x] This change adds test coverage
• [x] This change has been tested on the latest version of the platform/language

Checklist

• [x] I have read the Auth0 general contribution guidelines
• [x] I have read the Auth0 Code of Conduct
• [x] All existing and new tests complete without errors

[jak]

@desusai7 @jimmyjames Sorry for the direct tags - I can see you've been recently active in the repo.

Is this change acceptable? I'd welcome any and all feedback.

Thanks