User story:

Following our docs, we mention two methods for k8s authentication - the template for aws-iam-authenticator method is pretty much straightforward, but for the client-certificate method we don't explain where and how to get client-certificate-data: << CLIENT_CERT_DATA >> and client-key-data: << CLIENT_KEY_DATA >>

Acceptance criteria:

We need better explanation for client-certificate method (so far this method wasn't even verified to work by QA)