[Bug] Disable cookies for client routes

[simonhir]

Bug description

Clients routes use JWT for authentication and therefore no cookies are needed.
Nevertheless, a cookie is currently set when the routes are used.

Expected behaviour

No cookies are set when using client routes.

Steps for reproduction

Make a request to a client route -> session cookie is set

Affected component

refarch-gateway

Additional context (optional)

it-at-m/digiwf-core#1397