Clean up istioctl test directory (#19667)
Clean up istioctl test directory (#19667)

This is not removing any tests, we moved the tests to a different folder
and had to keep this folder around for CI to pass. This is just a
cleanup
smawson/istio,smawson/istio,istio/istio,smawson/istio,smawson/istio,istio/istio,istio/istio,istio/istio,smawson/istio,smawson/istio,istio/istio