jobs: continuous: set strategy based on number of replicas
If the job only has one replica, use strategy: Recreate, so if the job is restarted, only one pod is running at any given time.
If the job has more than one replica, use strategy: RollingUpdate, which will let multiple pods run while restarting them.
Bug: T375366 Signed-off-by: Arturo Borrero Gonzalez aborrero@wikimedia.org