Fix anchors being disabled in obsolete Adaptive Cards

[corinagum]

Fixes #3618
Fixes #3582

Changelog Entry

Description

Previously, Adaptive Cards that have been marked as obsolete in the DOM were disabling anchors, which is invalid behavior. This change makes it so that while other inputs are disabled, anchors remain enabled and can be clicked/navigated to when in an older message in the transcript.

This also fixes the Disable Adaptive Cards sample, which had an error in it.

• I have added tests and executed them locally
• I have updated CHANGELOG.md
• [ ] I have updated documentation

Review Checklist

This section is for contributors to review your work.

• Accessibility reviewed (tab order, content readability, alt text, color contrast)
• Browser and platform compatibilities reviewed
• CSS styles reviewed (minimal rules, no z-index)
• Documents reviewed (docs, samples, live demo)
• Internationalization reviewed (strings, unit formatting)
• package.json and package-lock.json reviewed
• Security reviewed (no data URIs, check for nonce leak)
• Tests reviewed (coverage, legitimacy)

[amal-khalaf]

pending comments