doc: Update documentation related to namespaces

[mglotov]

Prerequisites

Please answer the following questions for yourself before submitting an issue. YOU MAY DELETE THE PREREQUISITES SECTION.

• [x] I am running the latest version
• [x] I checked the documentation and found no answer
• [x] I checked to make sure that this issue has not already been filed

Expected Behavior

Update documentation and schemas.

Current Behavior

We changed k8s namespaces structure, but didn't reflect these changes in documentation