Ensure that Service Account Tokens are only mounted where necessary

Description:

Service accounts tokens should not be mounted in pods except where the workload running in the pod explicitly needs to communicate with the API server

Rationale:

Mounting service account tokens inside pods can provide an avenue for privilege escalation attacks where an attacker is able to compromise a single pod in the cluster.

Avoiding mounting these tokens removes this attack avenue.

Pods mounted without service account tokens will not be able to communicate with the API server, except where the resource is available to unauthenticated principals.

Modify the definition of pods and service accounts which do not need to mount service account tokens to disable it.