When creating a Pod or a Job, could the scheduling strategy of preferredDuringSchedulingIgnoredDuringExecution be supported?

[jlcoo]

Currently, we only support the `requiredDuringSchedulingIgnoredDuringExecution` scheduling strategy. Could we consider supporting the `preferredDuringSchedulingIgnoredDuringExecution` strategy to allow the runner Pod and the workflow Pod to be scheduled onto different nodes?