Forms can now ignore destination parameter

2 new functions have been added to the FormStateInterface

  /**
   * Determines whether the redirect respects the destination query parameter.
   *
   * @param bool $status
   *   (optional) TRUE if the redirect should take precedence over the
   *   destination query parameter. FALSE if not. Defaults to TRUE.
   *
   * @return $this
   */
  public function setIgnoreDestination(bool $status = TRUE);

  /**
   * Gets whether the redirect respects the destination query parameter.
   *
   * @return bool
   *   TRUE if the redirect should take precedence over the destination query
   *   parameter.
   */
  public function getIgnoreDestination(): bool;

Now it's possible to ignore the destination URL parameter in the form_state
Example

     $form_state->setRedirect(
          'block.admin_add',
          [
            'plugin_id' => 'block_content:' . $block->uuid(),
            'theme' => $theme,
          ]
        );
        $form_state->setIgnoreDestination();