[csi 平滑升级] 平滑升级问题和改进

[YunhuiChen]

What happened:

What you expected to happen: 1、dashboard没有记录平滑升级相关事件 2、 csi 权限没有加，平滑升级导致业务Bad file number

3、dashboard 平滑升级建议显示一下进行中和成功、失败

4、平滑升级后 宿主机df卡住，老的mount pod 挂载点卡住的。 而且应用pod内的挂载点也卡住 How to reproduce it (as minimally and precisely as possible):

Anything else we need to know?

Environment:

• JuiceFS CSI Driver version (which image tag did your CSI Driver use):
• Kubernetes version (e.g. kubectl version):
• Object storage (cloud provider and region):
• Metadata engine info (version, cloud provider managed or self maintained):
• Network connectivity (JuiceFS to metadata engine, JuiceFS to object storage):
• Others: