RoleBinding created when triming suffix is not valid

[Donatien26]

When adding a trim of the namespace suffix the corresponding rolebinding (giving rights to user) look like this:

Name:         namespace_admin
Labels:       created_by=onyxia
Annotations:  <none>
Role:
  Kind:  ClusterRole
  Name:  admin
Subjects:
  Kind   Name                    Namespace
  ----   ----                    ---------
  Group  oidc-grp-test           projet-test

The first column is the combinaison of prefix (added by the oidc-proxy on api server) and the group on which we want to give access on the group. The group must not be cut. For example i have the following group in my token : test_K8S, I want to cut the _K8S for the project but to keep the suffix for the name. Tell me if it's not clear

Expected:

Name:         namespace_admin
Labels:       created_by=onyxia
Annotations:  <none>
Role:
  Kind:  ClusterRole
  Name:  admin
Subjects:
  Kind   Name                    Namespace
  ----   ----                    ---------
  Group  oidc-grp-test_K8S       projet-test