When a new executor starts up, it adopts the orphan kubernetes resources created
by the old executor instance. However, the adopted resource won't reflect the changes
come with the new executor, for example, the fetcher image inside won't be changed.
To solve this, executor updates the resource spec (HPA/Deployment/Service) with the
latest resources spec. By doing this, we can prevent the inconsistency between resources
created by different executor instance, also minimizes the impact on users.
