oidc-agent clients do not appear in My clients tab

[federicaagostini]

oidc-agent registers new clients trough an unauthenticated request to the IAM registration endpoint. Because of this, a user who approved that client thinks that the oidc-agent client should appear in the My clients left tab of the IAM dashboard.

We should fix this assuming that the user who gave grant to the oidc-agent client is also a client owner. And we should find a way to select only oidc-agent clients during this client linking, otherwise all clients that allow login with IAM would appear in the My clients tab of authenticated users.