[BUG] Pod hang in PreparingUpdate state

[shiyan2016]

What happened:
Pod hang in PreparingUpdate state.

What you expected to happen:
Pod in Normal state.
How to reproduce it (as minimally and precisely as possible):
Inplace update a cloneset with inplaceupdate lifecycle hook from v1 to v2, when pod updated to PreparingUpdate state to wait lifecycle blocker to remove, then rollback cloneset to v1, the pod with PreparingUpdate state will hang.

Anything else we need to know?:

Environment:

• Kruise version: v1.3.0
• Kubernetes version (use kubectl version):
• Install details (e.g. helm install args):
• Others: