fix(plugin-vue2): fix loaders duplicating problem caused by vue-loader@15

[xc2]

Summary

Case https://github.com/web-infra-dev/rsbuild/actions/runs/8741123011/job/23986414872?pr=2142

Since I have no idea about the current maintenance status of vue-loader@15, I create this quick fix plugin as an alternative of vuejs/vue-loader#2071

Related Links

fixes #2093

Checklist

• Tests updated (or not required).
• Documentation updated (or not required). - no need

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[chenjiahan]

Nice workaround 👍

We can remove the quick fix plugin after vue-loader@15 release a version or Rsbuild integrated with the Native CSS extract plugin.