feat(gallery): design update - FRONT-4387

[emeryro]

• display title instead of description in the teaser
• reorder elements in the overlay (previous/next buttons)
• display title in the overlay
• remove truncation of the description, but display it full width

[github-actions]

🚀 Deployed on https://ecl-preview-3390--europa-component-library.netlify.app

[planctus]

something broke, the same happened in the slider, guess it's about buttons:

[emeryro]

@planctus indeed that seem to be an issue introduced when we worked on the single icons set.
I set the display to inline-flex, it should be fine now.