kubernetes: Set system:authenticated on anonymous projects
kubernetes: Set system:authenticated on anonymous projects

Fixes #6711
Closes #6714
michalskrivanek/cockpit,dperpeet/cockpit,deryni/cockpit,mareklibra/cockpit,deryni/cockpit,michalskrivanek/cockpit,Scribery/cockpit,mvollmer/cockpit,larskarlitski/cockpit,deryni/cockpit,stefwalter/cockpit,xhad/cockpit,larsu/cockpit,petervo/cockpit,dperpeet/cockpit,moraleslazaro/cockpit,dperpeet/cockpit,michalskrivanek/cockpit,Scribery/cockpit,petervo/cockpit,Scribery/cockpit,harishanand95/cockpit,xhad/cockpit,michalskrivanek/cockpit,harishanand95/cockpit,mvollmer/cockpit,garrett/cockpit,Scribery/cockpit,cockpit-project/cockpit,dperpeet/cockpit,petervo/cockpit,larskarlitski/cockpit,larsu/cockpit,xhad/cockpit,garrett/cockpit,moraleslazaro/cockpit,cockpit-project/cockpit,cockpituous/cockpit,martinpitt/cockpit,moraleslazaro/cockpit,stefwalter/cockpit,SotolitoLabs/cockpit,harishanand95/cockpit,xhad/cockpit,andreasn/cockpit,larsu/cockpit,mvollmer/cockpit,andreasn/cockpit,deryni/cockpit,cockpit-project/cockpit,michalskrivanek/cockpit,harishanand95/cockpit,xhad/cockpit,andreasn/cockpit,cockpituous/cockpit,andreasn/cockpit,cockpit-project/cockpit,xhad/cockpit,cockpituous/cockpit,SotolitoLabs/cockpit,harishanand95/cockpit,dperpeet/cockpit,garrett/cockpit,andreasn/cockpit,mareklibra/cockpit,martinpitt/cockpit,stefwalter/cockpit,mareklibra/cockpit,andreasn/cockpit,martinpitt/cockpit,mareklibra/cockpit,cockpituous/cockpit,stefwalter/cockpit,stefwalter/cockpit,deryni/cockpit,petervo/cockpit,larskarlitski/cockpit,garrett/cockpit,dperpeet/cockpit,Scribery/cockpit,moraleslazaro/cockpit,stefwalter/cockpit,moraleslazaro/cockpit,cockpituous/cockpit,SotolitoLabs/cockpit,michalskrivanek/cockpit,larsu/cockpit,mareklibra/cockpit,harishanand95/cockpit,larskarlitski/cockpit,garrett/cockpit,SotolitoLabs/cockpit,andreasn/cockpit,SotolitoLabs/cockpit,petervo/cockpit,larsu/cockpit,dperpeet/cockpit,xhad/cockpit,deryni/cockpit,Scribery/cockpit,deryni/cockpit,larskarlitski/cockpit,martinpitt/cockpit,mvollmer/cockpit,petervo/cockpit,cockpit-project/cockpit,larskarlitski/cockpit,mareklibra/cockpit,cockpituous/cockpit,stefwalter/cockpit,larskarlitski/cockpit,larsu/cockpit,SotolitoLabs/cockpit,SotolitoLabs/cockpit,mvollmer/cockpit,martinpitt/cockpit,petervo/cockpit,moraleslazaro/cockpit,mareklibra/cockpit,harishanand95/cockpit,moraleslazaro/cockpit,Scribery/cockpit,michalskrivanek/cockpit