Enable all kube-linter rules

[czeslavo]

Context

In #751 we added kube-linter to our CI pipeline, suppressing all rules that were failing. The goal of this ticket is to enable all ignored rules OR add an explicit ignore annotation to the objects that have to break the rule due to some higher requirement.

The annotation can look as follows:

metadata:
  annotations:
    ignore-check.kube-linter.io/privileged: "This deployment needs to run as privileged because it needs kernel access"

Rules to be enabled

• "no-read-only-root-fs"
• "run-as-non-root"
• "unset-cpu-requirements"
• "unset-memory-requirements"

Acceptance criteria

• No rules are specified in the exclude section of the .kube-linter.yaml config.
• If there was an object in the helm chart that has to break any of the rules, it's explicitly explained in form of an ignore-check.kube-linter.io/rule-name annotation

[czeslavo]

Reopening as #1057 hasn't addressed all excluded rules.