Update Content Card to accept stacked_image param and for content_type to accept lists - #5819

Done

Updates the Content card pattern to full the needs outlined in this Figma design.

Content card

• Added stacked_image parameter to force image to be above content on individual cards
• The content_type footer field now accepts a list of strings, rendering each item as a separate read-only chip

Fixes https://warthogs.atlassian.net/browse/WD-37306

QA

• Open demo
• See the card accepting multiple chip
• See the card with stacked image (and that it matches the Figma design)

Check if PR is ready for release

If this PR contains Vanilla SCSS or macro code changes, it should contain the following changes to make sure it's ready for the release:

• PR should have one of the following labels to automatically categorise it in release notes:
  • Feature 🎁, Breaking Change 💣, Bug 🐛, Documentation 📝, Maintenance 🔨.
• Vanilla version in package.json should be updated relative to the most recent release, following semver convention
  • if existing APIs (CSS classes & macro APIs) are not changed it can be a bugfix release (x.x.X)
  • if existing APIs (CSS classes & macro APIs) are changed/added/removed it should be a minor version (x.X.0)
  • see the wiki for more details
• Any changes to component class names (new patterns, variants, removed or added features) or macros should be listed on the what's new page.

Screenshots

[if relevant, include a screenshot or screen capture]