topology: read ConfigMap colcated with Kuadrant instance (currently hard-coded)

[jasonmadigan]

In the topology view, read the DOT from the secret ConfigMap in the same NS as the Kuadrant instance. Currently, this is hard-coded

[Boomatang]

If it can hep to get around the hardcoded namespace the configmap is labelled with kuadrant.io/topology=true

[jasonmadigan]

thanks @Boomatang - that does help.

Thinking we'll go down a route like this:

• Add some env-vars to our deployment with the name/ns of the CM
• Create a custom startup script as part of our asset image that injects these env-vars into a JS file
• Plugin reads this JS, and knows where to locate the topology CM

Follow on issue: we need to document that users need read access to this resource for the topology view to work.

[jasonmadigan]

PRs:

#93
Kuadrant/kuadrant-operator#920