[ARO-15117] MIWI e2e - remove disk-csi missing permissions workaround

[cadenmarchese]

Which issue this PR addresses:

Fixes https://issues.redhat.com/browse/ARO-15117

What this PR does / why we need it:

Previously we included this code because the disk-csi built-in role was missing a permission, and adding actions to built-in roles takes a while.

Now, the built-in has the permission, so we can safely remove this code:

az role definition list --name "Azure Red Hat OpenShift Disk Storage Operator"
[
  {
    "assignableScopes": [
      "/"
    ],
    "createdBy": null,
    "createdOn": "2024-01-30T16:11:37.947432+00:00",
    "description": "Install Container Storage Interface (CSI) drivers that enable your cluster to use Azure Disks. Set OpenShift cluster-wide storage defaults to ensure a default storageclass exists for clusters.",
    "id": "/subscriptions/60bf318d-6914-4105-a3b5-d0d2c10388c8/providers/Microsoft.Authorization/roleDefinitions/5b7237c5-45e1-49d6-bc18-a1f62f400748",
    "name": "5b7237c5-45e1-49d6-bc18-a1f62f400748",
    "permissions": [
      {
        "actions": [
          "Microsoft.Compute/virtualMachines/write",
          "Microsoft.Compute/virtualMachines/read",
          "Microsoft.Compute/virtualMachineScaleSets/virtualMachines/write",
          "Microsoft.Compute/virtualMachineScaleSets/virtualMachines/read",
          "Microsoft.Compute/virtualMachineScaleSets/read",
          "Microsoft.Compute/snapshots/write",
          "Microsoft.Compute/snapshots/read",
          "Microsoft.Compute/snapshots/delete",
          "Microsoft.Compute/locations/operations/read",
          "Microsoft.Compute/locations/DiskOperations/read",
          "Microsoft.Compute/disks/write",
          "Microsoft.Compute/disks/read",
          "Microsoft.Compute/disks/delete",
          "Microsoft.Compute/disks/beginGetAccess/action",
          "Microsoft.Compute/diskEncryptionSets/read",
          "Microsoft.Resources/subscriptions/resourceGroups/read"
        ],
        "condition": null,
        "conditionVersion": null,
        "dataActions": [],
        "notActions": [],
        "notDataActions": []
      }
    ],
    "roleName": "Azure Red Hat OpenShift Disk Storage Operator",
    "roleType": "BuiltInRole",
    "type": "Microsoft.Authorization/roleDefinitions",
    "updatedBy": null,
    "updatedOn": "2025-03-28T17:59:48.057794+00:00"
  }
]

Test plan for issue:

• CI, regular e2e
• MIWI e2e (/azp run e2e)

Is there any documentation that needs to be updated for this PR?

How do you know this will function as expected in production?

[cadenmarchese]

/azp run e2e

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).

[cadenmarchese]

/azp run ci

[azure-pipelines]

Azure Pipelines successfully started running 1 pipeline(s).