Update to latest k8s-1.21.9.

Kurt Garloffrequested to merge
feat/k8s-1.21.9 into master

Created by: garloff

We also support 1.22.6/1.23.1, but let's keep to the latest 1.21.x for now.

Signed-off-by: Kurt Garloff kurt@garloff.de

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