Add additional CTA block usage examples for Tiered List pattern

[pastelcyborg]

Done

• Added new CTA block usage examples based on Figma designs

Fixes WD-14297

QA

• Open the following demos:
  • description CTA block
  • list item CTA block
• Confirm new CTA blocks appear as expected compared to design
• Review updated documentation:
  • Tiered list docs

Check if PR is ready for release

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

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

[webteam-app]

Demo

Jenkins

demos.haus

[lyubomir-popov]

looks good thanks @pastelcyborg!