Increase Nextcloud livenessProbe's leniency
I propose we use the same (or maybe even a bit more lenient) values as the 'rabitmq' pod's probes has:
Liveness: exec [sh -c rabbitmq-api-check "http://user:$RABBITMQ_PASSWORD@127.0.0.1:15672/api/healthchecks/node" '{"status":"ok"}'] delay=120s timeout=20s period=30s #success=1 #failure=6
Readiness: exec [sh -c rabbitmq-api-check "http://user:$RABBITMQ_PASSWORD@127.0.0.1:15672/api/healthchecks/node" '{"status":"ok"}'] delay=10s timeout=20s period=30s #success=1 #failure=3