Use arm template parameters as sole input for live test environment variables (Azure#25301)

Author: benbp

sdk/keyvault/test-resources.json

@@ -132,6 +132,13 @@
       "metadata": {
         "description": "Test attestation service for Secure Key Release"
       }
+    },
+    "storageEndpointSuffix": {
+      "type": "string",
+      "defaultValue": "core.windows.net",
+      "metadata": {
+          "description": "The url suffix to use when accessing the storage data plane."
+      }
     }
   },
   "variables": {
@@ -478,6 +485,10 @@
       "type": "string",
       "value": "[parameters('testApplicationOid')]"
     },
+    "KEYVAULT_STORAGE_ENDPOINT_SUFFIX": {
+        "type": "string",
+        "value": "[parameters('storageEndpointSuffix')]"
+    },
     "BLOB_STORAGE_ACCOUNT_NAME": {
       "type": "string",
       "value": "[variables('primaryAccountName')]"