Use the new OIDC for getting profile

[Gerviba]

Refactor auth component to use the new OIDC.

Also we might try to use the same JWT for the backend as we use for the frontend so we don't have to log in after a restart...

[linear]

KIR-465 Use the new OIDC for getting profile

[Isti01]

After the cookie update on the frontend #781
The admin panel should work with the same jwt cookie too, authenticated api calls work from the browser

[Gerviba]

No, I mean to use JWT instead of JSESSIONID for the backend.

[Isti01]

Yeah, me too. I started doing it here: #786