Upgrade keycloak version

Our current docker environment [1] is more advanced (version 12) [1] than our current production instance (version 10) [2].

We should consider upgrading and maybe stick to the same version between those 2 environments (from the upgrade version moment onward).

• [1]

+ docker-compose -f docker-compose.yml -f docker-compose.keycloak.yml -f docker-compose.override.yml exec keycloak cat /opt/jboss/keycloak/version.txt
Keycloak - Version 12.0.3

• [2]

ssh kelvingrove cat /opt/keycloak/version.txt
Keycloak - Version 10.0.2

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Migrated from T3171 (view on Phabricator)