fix(ClientRequest): support `Request` as init when recording raw headers

[kettanaito]

• Fixes #2290
• https://github.com/mswjs/interceptors/releases/tag/v0.35.7

[kettanaito]

Released: v2.4.9 🎉

This has been released in v2.4.9!

• 📄 Release notes
• 📦 npm package

Make sure to always update to the latest version (npm i msw@latest) to get the newest features and bug fixes.

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