Upgrade from v13 to v14

This guide describes the steps to perform an upgrade of the component from version v13 to v14.

Breaking Changes

Without intervention - see below - the default relativ path of Keycloak changes from /auth to /! New installations shall follow the default, which is / since a while.
Passthrough proxy mode passthrough does no longer recongnize X-Forwarded headers.

Changes

The component requires Kubernetes v1.24 or newer.
Keycloak version is v22.0.5 by default.
Keycloak does now support IPv4 and IPv6 at the same time (dualstack).

Parameter changes

relativePath has been added.

Step-by-step guide

When upgrading the component, the following actions are required if the built-in database is used:

Do a backup of the built-in database.

instance=keycloak
namespace=syn-${instance}

kubectl -n "${namespace}" exec -ti keycloak-postgresql-0 -c postgresql -- sh -c 'PGDATABASE="$POSTGRES_DATABASE" PGUSER="$POSTGRES_USER" PGPASSWORD="$POSTGRES_PASSWORD" pg_dump --clean' > keycloak-postgresql-$(date +%F-%H-%M-%S).sql

If you want to preserve the relativ path of /auth for first installations based on Wildfly please add:
```
parameters:
  <keycloak instance>:
    relativePath: /auth
```
Apply the parameter changes.
Compile and push the cluster catalog.