MessageBar should have border always visible for 6.5

[thatblindgeye]

Per design, border on the message bar should be visible all the time for the 6.5 release, and the hover and focus states should use hover and clicked color tokens.

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Jira Issue: PF-4232

[github-actions]

🎉 This issue has been resolved in version 6.6.0-prerelease.8 🎉

The release is available on:

• GitHub release
• npm package (@prerelease dist-tag)

Your semantic-release bot 📦🚀