Feature: Display Validation Error Messages on UI for Restricted Pod Exec Actions

[pawan-59]

🔖 Feature description

We have written ValidatingAdmissionPolicy to restrict any user exec in specific pods, which is working fine. Still, the error is not showing on UI as to why the user cannot exec into the pods.
Policy applied:

apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingAdmissionPolicy
metadata:
  name: block-postgres-exec
spec:
  failurePolicy: Fail
  matchConstraints:
    matchPolicy: Equivalent
    namespaceSelector: {}
    objectSelector: {}
    resourceRules:
      - apiGroups:
          - ""
        apiVersions:
          - v1
        operations:
          - CONNECT
        resourceNames:
          - postgresql-14-dcd-0
        resources:
          - pods/exec
        scope: "*"
  paramKind:
    apiVersion: admissionregistration.k8s.io/v1
    kind: ValidatingAdmissionPolicyBinding
  validations:
    - expression: "false"
      message: Exec is not allowed into postgres

apiVersion: admissionregistration.k8s.io/v1
kind: ValidatingAdmissionPolicyBinding
metadata:
  name: block-postgres-exec-binding
spec:
  matchResources:
    matchPolicy: Equivalent
    namespaceSelector: {}
    objectSelector: {}
  policyName: block-postgres-exec
  validationActions:
    - Deny

Please find the attached screenshot for reference
It throws the below error when we try using kubectl command.

But on Devtron it only shows like this.

🎤 Pitch / Usecases

There should be visibility to users why they are not able to exec into the pods.

🔄️ Alternative

No response

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• I checked and didn't find similar issue

🏢 Have you read the Code of Conduct?

• I have read the Code of Conduct