Enable LS Login access for all ELIXIR users (keep manager group for service administration)

[vschnei]

Summary

Broaden access to the ELIXIR-on-Cloud service so that any authenticated
ELIXIR user (anyone with an ELIXIR / LS-Login profile) can sign in and use
the service, while retaining a dedicated manager group that can administer
the LS Login service configuration itself.

current state

The service is registered as a Relying Party (RP) on Life Science Login
(LS AAI). Access is currently restricted to a small management group of
three ELIXIR users via group membership. As a result, every other ELIXIR
user is blocked at the LS Login authorization step even though they have a
valid ELIXIR profile.

Verification

• A non-manager ELIXIR user (with a valid LS-Login profile) can complete
  the login flow and reach the service dashboard.
• A user without an ELIXIR profile is still denied.
• A manager can open the RP in SPREG and edit its configuration
  (redirect URIs, group assignments) without escalation.