Changes to check if the lakeFS installation is already set up

removed the required property login_config/login_cookie_names from the response with the 200 status

removed the required property login_config/login_url from the response with the 200 status

removed the required property login_config/logout_url from the response with the 200 status

removed the optional property login_config/RBAC from the response with the 200 status

removed the optional property login_config/fallback_login_label from the response with the 200 status

removed the optional property login_config/fallback_login_url from the response with the 200 status

removed the optional property login_config/login_url_method from the response with the 200 status

removed the optional property login_config/password_ui_placeholder from the response with the 200 status

removed the optional property login_config/username_ui_placeholder from the response with the 200 status

added the new internal enum value to the login_config/RBAC response property for the response status 200

added the optional property login_config/login_url_method to the response with the 200 status

added the non-success response with the status 429

removed the non-success response with the status 420

added the optional property login_config/password_ui_placeholder to the response with the 200 status

added the optional property login_config/username_ui_placeholder to the response with the 200 status

removed the optional property login_config/login_url_method from the response with the 200 status

removed the optional property login_config/password_ui_placeholder from the response with the 200 status

removed the optional property login_config/username_ui_placeholder from the response with the 200 status

added the non-success response with the status 420

removed the non-success response with the status 429

removed the internal enum value from the login_config/RBAC response property for the response status 200