code: func randomAzureStorageAccountName() string {
  	const (
  		maxLen = 24
  		chars  = "0123456789abcdefghijklmnopqrstuvwxyz"
  	)
  	return storageAccountPrefix + randomString(maxLen-len(storageAccountPrefix), chars)
  }
docs: /* Utilities */
  // randomAzureStorageAccountName generates a valid storage account name prefixed
  // with a predefined string. Availability of the name is not checked. Uses maximum
  // length to maximise randomness.