precreated namespaces with openshift <username> when OpenShift OAuth

[sparkoo]

Is your enhancement related to a problem? Please describe.

When we're looking for pre-created namespaces, we currently support only <username> placeholder, which is using che username. In case we're on OpenShift OAuth, we need to support openshift user as well.

see discussion from this comment down #15323 (comment)

Q:
Do we need to support openshift userid as well ?

Describe the solution you'd like

Add placeholder for openshift username and search for such annotated namespaces.

The current default annotation is che.infra.kubernetes.namespace.annotations=che.eclipse.org/username=<username> (https://github.com/eclipse/che/blob/master/assembly/assembly-wsmaster-war/src/main/webapp/WEB-INF/classes/che/che.properties#L271). The che.infra.kubernetes.namespace.annotations is list of annotations and current implementation is searching for namespaces with all the annotations in the list. This should be revisited, if we want change it to OR (so it could then be che.eclipse.org/username=<username>,che.eclipse.org/username=<openshift-username>) or we'll choose different approach here.

Describe alternatives you've considered

Additional context

#15323

[che-bot]

Issues go stale after 180 days of inactivity. lifecycle/stale issues rot after an additional 7 days of inactivity and eventually close.

Mark the issue as fresh with /remove-lifecycle stale in a new comment.

If this issue is safe to close now please do so.

Moderators: Add lifecycle/frozen label to avoid stale mode.