feat: background audit config, severity and category annotations.

Updates policy metadata.yml file adding the new configuration to enabled
background audit checks and adds two new annotations used by the audit
scanner in its reports.

Signed-off-by: José Guilherme Vanz <[email protected]>

metadata.yml

@@ -1,8 +1,12 @@
 rules:
-- apiGroups: [""]
-  apiVersions: ["v1"]
-  resources: ["pods"]
-  operations: ["CREATE"]
+  - apiGroups:
+      - ''
+    apiVersions:
+      - v1
+    resources:
+      - pods
+    operations:
+      - CREATE
 mutating: false
 contextAware: false
 executionMode: kubewarden-wapc
@@ -11,24 +15,14 @@ annotations:
   io.artifacthub.displayName: Flexvolume Drivers Psp
   io.artifacthub.resources: Pod
   io.artifacthub.keywords: psp, container, runtime, flex volume, flex
+  # kubewarden specific
   io.kubewarden.policy.ociUrl: ghcr.io/kubewarden/policies/flexvolume-drivers-psp
-  # io.kubewarden.hidden-ui: "true"
-  # rest
   io.kubewarden.policy.title: flexvolume-drivers-psp
-  io.kubewarden.policy.description:  Replacement for the Kubernetes Pod Security Policy that controls the allowed `flexVolume` drivers 
-  io.kubewarden.policy.author: "Kubewarden developers <[email protected]>"
+  io.kubewarden.policy.description: Replacement for the Kubernetes Pod Security Policy
+    that controls the allowed `flexVolume` drivers
+  io.kubewarden.policy.author: Kubewarden developers <[email protected]>
   io.kubewarden.policy.url: https://github.com/kubewarden/flexvolume-drivers-psp-policy
   io.kubewarden.policy.source: https://github.com/kubewarden/flexvolume-drivers-psp-policy
   io.kubewarden.policy.license: Apache-2.0
-  io.kubewarden.policy.usage: |
-    This policy allows to provide a list of allowed Flex Volume drivers.
-
-    The configuration supports a list of allowed flex volume drivers. An example follows:
-
-    ```yaml
-    allowedFlexVolumes:
-      - driver: example/lvm
-      - driver: example/cifs
-    ```
-
-    If the pod to be evaluated has a different driver on any `flexVolume` volume, it will be rejected.
+  io.kubewarden.policy.category: PSP
+  io.kubewarden.policy.severity: medium