GPU-937 Add image manipulation support for webp images

[yrucrem]

Abstract

Adds a webp plugin for ImageIO to enable image manipulations for webp images.

Checklist

General

• [ ] Added abstract that describes the change
• [ ] Added changelog entry to /CHANGELOG.adoc
• [ ] Ensured that the change is covered by tests
• [ ] Ensured that the change is documented in the docs

On API Changes

• [ ] Checked if the changes are breaking or not
• [ ] Added GraphQL API if applicable
• [ ] Added Elasticsearch mapping if applicable