What this PR does / why we need it:
This PR is an implementation of Rule 2004 of the Security Hardened Shoot Cluster Ruleset. It evaluates the admission plugins of the shoot's kube-apiserver by checking if the ValidatingAdmissionWebhook is enabled (explicitly or by default).
Which issue(s) this PR fixes:
Part of #304
Special notes for your reviewer:
Release note:
Implementation for rule `2004` from the `security-hardened-shoot-cluster` ruleset for provider `garden`.
What this PR does / why we need it: This PR is an implementation of Rule 2004 of the Security Hardened Shoot Cluster Ruleset. It evaluates the admission plugins of the shoot's kube-apiserver by checking if the ValidatingAdmissionWebhook is enabled (explicitly or by default).
Which issue(s) this PR fixes: Part of #304
Special notes for your reviewer:
Release note: