Summary

• move method on ExportInfo into ExportInfoId, the second param is always &ModuleGraph or &mut ModuleGraph, which is kind of a 'token' implies this method is mutable or immutable.
• since now every method need get ExportInfo on ModuleGraph, so use UkeyMap to optimize this.
• rename ExportInfoId to ExportInfo, ExportInfo to ExportInfoData, in most of cases you should only care aboue ExportInfo instead of ExportInfoData.

Checklist

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