fix(playground,quick-editor): send raw request method through custom header instead of request method

[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.

---

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Latest commit: de409d9

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[github-actions]

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wget https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12483242567/npm-package-cloudflare-workers-bindings-extension-7630 -O ./cloudflare-workers-bindings-extension.0.0.0-v17312573e.vsix && code --install-extension ./cloudflare-workers-bindings-extension.0.0.0-v17312573e.vsix

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npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12483242567/npm-package-cloudflare-pages-shared-7630

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12483242567/npm-package-cloudflare-unenv-preset-7630

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npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12483242567/npm-package-cloudflare-workers-editor-shared-7630

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/12483242567/npm-package-cloudflare-workers-shared-7630

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Note that these links will no longer work once the GitHub Actions artifact expires.

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[email protected] includes the following runtime dependencies:

Package	Constraint	Resolved
miniflare	workspace:*	3.20241218.0
workerd	1.20241218.0	1.20241218.0
workerd --version	1.20241218.0	2024-12-18

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