Add meaningful dashboard warnings during the failures on namespace provisioning when auto-provisioning is disabled and advanced authorization is enabled

[dipakkarde]

Is your enhancement related to a problem? Please describe

I have a customer with below concern :

Customer is using OpenShift DevSpaces 3.12.0 and setting auto-provisioning of namespaces turned off and setting advanced authorization as below :

 devEnvironments:
    containerBuildConfiguration:
      openShiftSecurityContextConstraint: container-build
    defaultNamespace:
      autoProvision: false                                <---------
      template: <username>-devspaces
    maxNumberOfWorkspacesPerUser: -1
    secondsOfInactivityBeforeIdling: 1800
    secondsOfRunBeforeIdling: -1
    security: {}
    startTimeoutSeconds: 300
    storage:
      pvcStrategy: per-user

$ oc get checluster devspaces -n openshift-operators -o yaml | grep -i networking -A12
  networking:
    auth:
      advancedAuthorization:                               <------------
        allowUsers:
        - test
      gateway:
        configLabels:
          app: che
          component: che-gateway-config
        kubeRbacProxy:
          logLevel: 0
        oAuthProxy:
          cookieExpireSeconds: 86400

After this when tried creating a sample workspace with kubeadmin user, But was not able to access the workspace with and was getting below errors in upper right corner :

Automatic namespace provisioning is disabled. Namespace might note have been configured yet. Please contact the administrator.
Advanced authorization is enabled. User might not be allowed. Please, contact the administrator.

and in middle of the screen we get below error :

HTTP Error code 500. Endpoint which throws an error https://devspaces.apps.occ.cc.corp/api/kubernetes/namespace/provision. Check the browser logs message.

Describe the solution you'd like

Customer Expectation :

The error message in the upper right corner is correct.

But they don't like the error message in the middle of the screen:

HTTP Error code 500. Endpoint which throws an error https://devspaces.apps.occ.cc.corp/api/kubernetes/namespace/provision. Check the browser logs message.

Their request is that this "ugly" message should be replaced with a more user-friendly message, that is, messages like:

Automatic namespace provisioning is disabled. Namespace might note have been configured yet. Please contact the administrator.

or

Advanced authorization is enabled. User might not be allowed. Please, contact the administrator.

Should be displayed in the middle of the screen instead of the top right corner.

Describe alternatives you've considered

No response

Additional context

No response