drop parameter registration_token, add authentication_token

https://gitlab.com/gitlab-org/gitlab/-/issues/381946

Two methods :

• new one uses authentication token
• deprecated one uses registration token

registration token method :

• is deprecated since Gitlab 15.6 (nov 2022)
• is disabled by default since Gitlab 16.0 (may 2023)
• will be dropped with Gitlab 17.0 (may 2024)