[hotfix] add hardening prod k8s (!8)

Co-authored-by: denis.patrakeev <denis.patrakeev@avroid.tech>
Reviewed-on: https://git.avroid.tech/K8s/k8s-deploy/pulls/8

env/avroid_prod/k8s-avroid-office.prod.local/inventory/hardening.yaml

@@ -0,0 +1,10 @@
+---
+# https://github.com/kubernetes-sigs/kubespray/blob/master/docs/operations/hardening.md
+# list of admission plugins that needs to be configured
+# https://kubernetes.io/docs/reference/access-authn-authz/admission-controllers/
+kube_apiserver_enable_admission_plugins:
+  - ServiceAccount
+  - NodeRestriction
+  - ResourceQuota
+  - PodNodeSelector
+kube_apiserver_admission_control_config_file: true