Remove av-embeds URL check override

[amoore108]

Summary

• Removes the resolvedUrl override check for av-embeds routes as all of these are now handled by the page-type header
• See Add temporary catch-all exception for av-embeds #13556

Developer Checklist

• UX
  • UX Criteria met (visual UX & screenreader UX)
• Accessibility
  • Accessibility Acceptance Criteria met
  • Accessibility swarm completed
  • Component Health updated
  • P1 accessibility bugs resolved
  • P2/P3 accessibility bugs planned (if not resolved)
• Security
  • Security issues addressed
  • Threat Model updated
• Documentation
  • Docs updated (runbook, READMEs)
• Testing
  • Feature tested on relevant environments
• Comms
  • Relevant parties notified of changes

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• Manual Testing complete?
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