[BUG]: CSM Authorization sidecar install fails if k8s worker nodes are not in ~/.ssh/known_hosts

[hoppea2]

Describe the bug
This failure occurs when running SSH commands within the csi-install.sh scripts that verify connectivity to the authorization proxy server host.
If the remote k8s worker node has not yet been added to the ~/.ssh/known_hosts file, then the script that parses the server response fails to get the correct HTTP status code it needs to validate.
The reason is that there is an extra line inserted in the response:
Warning: Permanently added '1.2.3.4' (ECDSA) to the list of known hosts.
To fix this, the verify.sh script could make a check if that warning occurred:
if [[ ${resp} == "Warning"* ]]
and then check for the status code with awk 'NR=="2" instead of awk 'NR=="1"

Fix should be applied to all supported drivers

To Reproduce
Steps to reproduce the behavior:

1. Install authrization sidecar with a driver where the k8s worker nodes have not been added to the ~/.ssh/known_hosts file