message: tools: Add `data-test-cs-version-control-button-cancel` attribute to the cancel button
diff: >
  Save
  </button>
  - <button class="cs-version-control--button cs-version-control--button-cancel">
  + <button class="cs-version-control--button cs-version-control--button-cancel" data-test-cs-version-control-button-cancel>
  Cancel
  </button>
  </div>
  