[chectl] server:update should clearly notify users if images are hard-coded in CheCluster CR

[sleshchenko]

Is your enhancement related to a problem? Please describe.

Currently, chectl provide a message:

Found deployed Eclipse Che with operator [quay.io/eclipse/che-operator]:7.12.1.
You are going to update it to [quay.io/eclipse/che-operator]:7.12.1.
Note that Eclipse Che operator will update component images (server, plugin registry) only if their values
are not overridden in eclipse-che Custom Resource. So, you may need to remove them manually.
Press q to quit or any key to continue: 

that gives a hint for user that some components may need manual updating after command is executed.
It would be better from UX perspective if chectl check CR and clearly say like:

Found deployed Eclipse Che with operator [quay.io/eclipse/che-operator]:7.12.1.
You are going to update it to [quay.io/eclipse/che-operator]:7.12.1.
[!Manual action required] Che Cluster has the following specified images that should be updated manually or set to '' to let Che Operator manage their values:
cheImage: quay.io/eclipse/che-server:7.12.1
postgresImage: quay.io/eclipse/che-postgres:7.12.1
Press q to quit or any key to continue: 
``
It would allow avoiding confusing and question like this https://github.com/eclipse/che/issues/17110

[tolusha]

Closed in favor of #17312

[sleshchenko]

@tolusha seems it's not closed even after your comment but I don't really agree that these issues are about the same issue.
But for sure they can be solved together.

[tolusha]

Fixed by che-incubator/chectl#827