Group deploy tokens
In #31591 (closed) we have project deploy tokens to allow read-only access to a project. Since many times projects are organized in groups, we can consider implementing tokens at group level.
Implement group deploy tokens, similar to #31591 (closed).
Group deploy tokens allow read-only access to any project in the group, even if it will be created after the token.
Tokens can then be exposed with a group variables to all the projects in the group.