Make templates compatible with media images

Replaced all 'field_image' with 'field_media_image' in templates.

For 'paragraph--slide.html.twig' templates and all its skin derivatives I have used the method below for getting the image url but if upon review there is a better method please provide an updated patch.

{% set image_url = file_url(content.field_media_image[0]['#item'].entity.getFileUri()) %}

Patch #2 is the wrong approach. Instead we are switching to use responsive images:

Ref commit: 6fe28ba7