Disable upgrade test since it is flaky and noisy. (#5627)
Disable upgrade test since it is flaky and noisy. (#5627)

* Disable upgrade test since it is flaky and noise.

* Fix linter

geeknoid/istio,smawson/istio,geeknoid/istio,frankbu/istio,geeknoid/istio,smawson/istio,smawson/istio,smawson/istio,istio/istio,istio/istio,frankbu/istio,frankbu/istio,frankbu/istio,smawson/istio,geeknoid/istio,istio/istio,geeknoid/istio,istio/istio,istio/istio,frankbu/istio,geeknoid/istio,smawson/istio,frankbu/istio