feat: support ContextModuleFactory alternativeRequests hook

[inottn]

Summary

close #6571

Checklist

• [x] Tests updated (or not required).
• [x] Documentation updated (or not required).

[netlify[bot]]

✅ Deploy Preview for rspack ready!

Built without sensitive environment variables

Name	Link
🔨 Latest commit	e73985110a3a9dee16225cf81d7a5bd28b3b5606
🔍 Latest deploy log	https://app.netlify.com/sites/rspack/deploys/66e3b921cf76210008de0399
😎 Deploy Preview	https://deploy-preview-7742--rspack.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.

---

To edit notification comments on pull requests, go to your Netlify site configuration.

[stale[bot]]

This pull request has been automatically marked as stale because it has not had recent activity. If this pull request is still relevant, please leave any comment (for example, "bump").

[chenjiahan]

@inottn can you rebase the PR and resolve the conflicts~

[chenjiahan]

Closing this PR because it has been inactive for a while. Feel free to reopen if needed.