Improve labeling of k8s components

[jfaltermeier]

Is your feature request related to a problem? Please describe.

It is hard to filter for resources related to Theia Cloud

Describe the solution you'd like

Session pods should have tags with the appdefintion that is being used and the user that uses the session.

In the long run all of our resources created by the operator or via helm should be labeled

Describe alternatives you've considered

-

Cluster provider

No response

Additional information

No response

[jfaltermeier]

Related PR by @xai : https://github.com/eclipse-theia/theia-cloud/pull/362