【feature request】YurtAppSet and YurtAppDaemon should support rollback

[SQxiaoxiaomeng]

What would you like to be added:
YurtAppSet and YurtAppDaemon should support rollback like Deployment

Why is this needed:

others
/kind feature

[rambohe-ch]

@SQxiaoxiaomeng Thank you for raising issue.
I think YurtAppSet can support rollback now. and you can update the specified nodePool template, then the underlying Deployment will rollback the pods in this NodePool.

[rambohe-ch]

@SQxiaoxiaomeng BTW, YurtAppDaemon looks like that can not support rollback strategy now.

[SQxiaoxiaomeng]

@rambohe-ch I'm sorry I didn't express clearly. What I want to say is that YurtAppSet should support rolling back to a certain historical version, just like kubectl rollout history deployment/xxx --revison=2，not to modify yaml.

[rambohe-ch]

@rambohe-ch I'm sorry I didn't express clearly. What I want to say is that YurtAppSet should support rolling back to a certain historical version, just like kubectl rollout history deployment/xxx --revison=2，not to modify yaml.

@SQxiaoxiaomeng Thank you for your kindly response. I think this feature requirement is quite reasonable. @kadisi Do you have any comments?