[feature request] WorkloadSpread should consider the update strategy where Pod is created before deletion.

[veophi]

What would you like to be added:
When the new Pod is created in this strategy, WorkloadSpread don't know which pod will be replaced, so cannot assign the new pod to the right subset.

• WorkloadSpread should support rollingUpdate type for Deployment；
• WorkloadSpread should support MaxSurge for CloneSet & Deployment;

Why is this needed:
For the better support to CloneSet & Deployment.