Enable file OAuth test cases (Azure#27627)

### Packages impacted by this PR


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### Describe the problem that is addressed by this PR


### What are the possible designs available to address the problem? If
there are more than one possible design, why was the one in this PR
chosen?


### Are there test cases added in this PR? _(If not, why?)_


### Provide a list of related PRs _(if any)_


### Command used to generate this PR:**_(Applicable only to SDK release
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### Checklists
- [ ] Added impacted package name to the issue description
- [ ] Does this PR needs any fixes in the SDK Generator?** _(If so,
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Author: EmmaZhu

sdk/storage/test-resources.json

@@ -73,6 +73,7 @@
     "authorizationApiVersion": "2018-01-01-preview",
     "blobDataContributorRoleId": "[concat('/subscriptions/', subscription().subscriptionId, '/providers/Microsoft.Authorization/roleDefinitions/ba92f5b4-2d11-453d-a403-e96b0029c9fe')]",
     "blobDataOwnerRoleId": "[concat('/subscriptions/', subscription().subscriptionId, '/providers/Microsoft.Authorization/roleDefinitions/b7e6dc6d-f1e8-4753-8033-0f276bb0955b')]",
+    "fileDataContributorRoleId": "[concat('/subscriptions/', subscription().subscriptionId, '/providers/Microsoft.Authorization/roleDefinitions/69566ab7-960f-475b-8e7c-b3118f30c6bd')]",
     "encryption": {
       "services": {
         "file": {
@@ -112,6 +113,16 @@
         "principalId": "[parameters('testApplicationOid')]"
       }
     },
+    {
+      "type": "Microsoft.Authorization/roleAssignments",
+      "apiVersion": "[variables('authorizationApiVersion')]",
+      "name": "[guid(concat('fileDataContributorRoleId', variables('accountName')))]",
+      "dependsOn": ["[variables('accountName')]"],
+      "properties": {
+        "roleDefinitionId": "[variables('fileDataContributorRoleId')]",
+        "principalId": "[parameters('testApplicationOid')]"
+      }
+    },
     {
       "type": "Microsoft.Storage/storageAccounts",
       "apiVersion": "[variables('storageApiVersion')]",