[CmdPal] Fix keyboard navigation double Tab stop in details panel (#46346)

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## Summary of the Pull Request

Fixes a keyboard accessibility issue in Command Palette where Tab
navigation would stop twice on container elements in the details panel
instead of navigating to details panel and then directly to interactive
controls. The items in the Details Panel aren't really interactable
anyways (the AllAppsPage & ClipBoard History just displays details)

This is part of the a11y bug batch.
User Impact:
Keyboard-only and assistive-technology users may experience confusion,
extra navigation effort, and reduced efficiency when interacting with
the Search Apps pane.

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## PR Checklist

- [ ] Closes: #xxx
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- [ ] **Localization:** All end-user-facing strings can be localized
- [ ] **Dev docs:** Added/updated
- [ ] **New binaries:** Added on the required places
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https://github.com/user-attachments/assets/0d5f0f20-040c-4d22-b769-3fe318c66697