Bug 34755: Backport Koha::Token change from bug 34478

Bug 34755: Backport Koha::Token change from bug 34478

This change includes the Koha::Token changes which uses
Koha::Session for generating and checking CSRF tokens.

0. Apply the patch and koha-plack --restart kohadev
1. Setup Keycloak OIDC SSO according to "Testing SSO"
wiki guide
2. In a regular window go to http://localhost:8080
3. In a private window go to http://localhost:8080 and click
the SSO "Log in with..." button, but don't log into Keycloak
4. In the regular window, login locally, and navigate to 5-6 pages
5. In the private window, log into Keycloak
6. Note that you are redirected back to Koha and logged in
successfully (no wrong_csrf_token error).

Signed-off-by: Olivier Hubert <olivier.hubert@inlibro.com>
Signed-off-by: Tomas Cohen Arazi <tomascohen@theke.io>