fix: configure the default assetPrefix for MF apps correctly

[chenjiahan]

Summary

The default asset prefix has been changed when using moduleFederation.options. These changes ensure that the assets of remote modules can be requested by consumer apps with the correct URL, and that the SPA URL fallback works as expected.

• Only change the default asset prefix for MF provider apps.
• Only change the default asset prefix in development mode (via dev.assetPrefix).
• The default asset prefix has been changed from auto to true (equivalent to localhost:<port>)
• Always prefer to use the dev.assetPrefix value set by user.

@nyqykk please take a look, I suppose these changes should be ported to @module-federation/rsbuild-plugin

Related Links

resolve: #3751

Checklist

• Tests updated (or not required).
• Documentation updated (or not required).

[netlify]

✅ Deploy Preview for rsbuild ready!

Name	Link
🔨 Latest commit	b2891b8
🔍 Latest deploy log	https://app.netlify.com/sites/rsbuild/deploys/671230c211136e000821c975
😎 Deploy Preview	https://deploy-preview-3757--rsbuild.netlify.app
📱 Preview on mobile	Toggle QR Code... Use your smartphone camera to open QR code link.
Lighthouse	1 paths audited Performance: 80 (🟢 up 1 from production) Accessibility: 97 (no change from production) Best Practices: 100 (no change from production) SEO: 92 (no change from production) PWA: 60 (no change from production) View the detailed breakdown and full score reports

---

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

[nyqykk]

ok i will port this to universe repo