func getTargetMapInfo(targetReader TargetReader) doesn't return namespace info

[neo-liang-sap]

Describe the bug
func getTargetMapInfo(targetReader TargetReader) doesn't return namespace info

To Reproduce
1.target a garden/seed/namespace
2.invoke getTargetMapInfo() function
3.no namepsace info included, other information garden,project,seed,shoot,shootTechnicalID are included

Expected behavior
namespace info should also be included

Screenshots
https://github.com/gardener/gardenctl/blob/master/pkg/cmd/miscellaneous.go#L270

Gardenctl Version (please complete the following information):
latest in master

Additional context

[jguipi]

I ran the test on my side and seems like I can see the namespace

And the output was :

As you can see the shootTechnicalID (the namespace) is present.

[neo-liang-sap]

Hi @jguipi ,
Thanks for looking into this, my original expectation is when we have such a target

gardenctl get target
target:
- kind: garden
  name: dev
- kind: project
  name: sretestneo
- kind: shoot
  name: neo-test-ar
- kind: namespace
  name: kube-system

getTargetMapInfo could return sth including kube-system.

However i don't have strong opinion to implement this, if you consider current design is OK feel free close this issue.

Thanks!
-Neo