Create a simple Drupal 8+ Form API (FAPI) native reset button

Drupal Form API doesn't offer a native HTML type="reset" button known from the W3C:

https://www.w3.org/TR/2012/WD-html-markup-20121025/input.reset.html

So if you ever need one, this might be a good starting point in Drupal 8+:

'reset' => [
  '#type' => 'html_tag',
  '#tag' => 'input',
  '#attributes' => [
    'class' => 'button button--reset',
    'type' => 'reset',
    'value' => $this->t('Reset'),
  ],
],