fix(playground-preview-worker): ensure OPTIONS raw HTTP requests are fowarded

[edmundhung]

Fixes DEVX-1449.

This PR fixes an issue in which the preview worker does not receive an raw OPTIONS request on both Quick Editor or Workers Playground.

---

• Tests
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• E2E Tests CI Job required? (Use "e2e" label or ask maintainer to run separately)
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• Public documentation
  • TODO (before merge)
  • Cloudflare docs PR(s):
  • Documentation not necessary because: bugfix

[changeset-bot]

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Latest commit: 926f3b4

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[github-actions]

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[email protected] includes the following runtime dependencies:

Package	Constraint	Resolved
miniflare	workspace:*	3.20241022.0
workerd	1.20241022.0	1.20241022.0
workerd --version	1.20241022.0	2024-10-22

Please ensure constraints are pinned, and miniflare/workerd minor versions match.

[edmundhung]

Superseded by #7630