[pyramid] Override cubicweb.hooks.syncsession.get_user_sessions() for Pyramid Closes #13436818

[pyramid] Retrieve user's groups using a custom RQL instead of user's groups property With cubicweb 3.24, user.groups is set lazily and so retrieving it at this point will cause a traceback because the connection is not yet entered. Also, user doesn't accept anymore groups and properties arguments.

[hooks] Change get_user_sessions prototype, necessary for hijacking from other session implementations (e.g. pyramid)