For the 'Invited' and 'New user' flow drop users on the Group/Project Overview page
Driving team member invites and invitee success is a key focus area for Growth.
Current Behaviour
When an existing user is invited to a Gitlab project or group, we land that user on the group/project overview page after access is granted.
When a new user is invited to a GitLab project, we land them on the group/project Activity page after the user is created access is granted.
Solution
We want to update where we 'drop' an invited newly created user to align with an existing user.
Update where we drop them to the group or project overview page so they can get oriented and start contributing to the project they were invited to.
Maintain the existing behaviour that if a user is invited to multiple groups/projects we default to the last one.
We will also handle all invite -> activity page changes here as well, see #430100 (comment 1659077092)