Use a renderable array for link buttons

Problem/Motivation

In order to make link labels easier to override, we should use a renderable array.

In https://git.drupalcode.org/project/intelligencebank/-/blob/4.0.x/modules...

I am seeing this

  $link_url = Url::fromRoute('id_dam_media.asset_browser_form');
  $link_url->setOptions([
    'attributes' => [
      'class' => ['use-ajax', 'button', 'button--primary'],
      'data-dialog-type' => 'modal',
      'data-dialog-options' => Json::encode([
        'dialogClass' => 'media-library-widget-modal',
        'width' => '75%',
        'height' => 'window.innerHeight',
        'minHeight' => 500,
      ]),
    ],
    'query' => $formState->get('media_library_state')->all(),
  ]);

  $form['ib_dam_container'] = [
    "#type" => "container",
    'asset_browser' => [
      '#type' => 'markup',
      '#markup' => Link::fromTextAndUrl(t('Open IntelligenceBank Browser'), $link_url)->toString(),
      '#attached' => ['library' => [
        'core/drupal.dialog.ajax',
        'ib_dam/ckeditor',
      ]]
    ],
  ];

But it could be this ($link->toRenderable();instead of using the '#markup' element) , and then it is easier to override the button text

    $url = Url::fromRoute('id_dam_media.asset_browser_form');
    $url->setOptions([
      'attributes' => [
        'class' => ['use-ajax', 'button', 'button--primary'],
        'data-dialog-type' => 'modal',
        'data-dialog-options' => Json::encode([
          'dialogClass' => 'media-library-widget-modal',
          'width' => '75%',
          'height' => 'window.innerHeight',
          'minHeight' => 500,
        ]),
      ],
      'query' => $form_state->get('media_library_state')->all(),
    ]);

    $link = Link::fromTextAndUrl(t('Open IntelligenceBank Browser'), $url);
    $renderable_link = $link->toRenderable();
    $renderable_link['#attached']['library'][] = 'core/drupal.dialog.ajax';
    $form['ib_dam_container']['asset_browser'] = $renderable_link;

Please let me know if you think this is a possibility, and I can make a Merge Request.