Provide k8gb controller metrics on GHA

[k0da]

Sometimes it is very handy to have an idea what happens with k8gb during terratest run on GHA

[ytsarev]

Which kind of metrics are we talking about here?

[jkremser]

https://github.com/jkremser/k8gb/runs/8188793508?check_suite_focus=true#step:10:5933