AdvancedTable::ThSort: mark @hasResizableColumns as optional

[shleewhite]

📌 Summary

If merged, this PR would make @hasResizableColumns optional for the AdvancedTable::ThSort component, which brings it inline with the AdvancedTable::Th component.

🔗 External links

Jira ticket: HDS-5166

---

👀 Component checklist

• Percy was checked for any visual regression
• A changelog entry was added via Changesets if needed (see templates here)

💬 Please consider using conventional comments when reviewing this PR.

📋 PCI review checklist

• If applicable, I've documented a plan to revert these changes if they require more than reverting the pull request.
• If applicable, I've worked with GRC to document the impact of any changes to security controls.
  Examples of changes to controls include access controls, encryption, logging, etc.
• If applicable, I've worked with GRC to ensure compliance due to a significant change to the in-scope PCI environment.
  Examples include changes to operating systems, ports, protocols, services, cryptography-related components, PII processing code, etc.

[vercel]

The latest updates on your projects. Learn more about Vercel for Git ↗︎

Name	Status	Preview	Updated (UTC)
hds-showcase	✅ Ready (Inspect)	Visit Preview	Jul 24, 2025 4:51pm
hds-website	✅ Ready (Inspect)	Visit Preview	Jul 24, 2025 4:51pm