[AdvancedChunks] `maxSize` should re-split the group into smaller groups based on files' relevance instead of pure file size

Problem: `maxSize` splits chunks based on file size. This causes all (or many) chunks to be loaded in many cases because the related modules may exist in both chunks.


Refs:

- https://github.com/webpack/webpack/blob/e0219482aafb9087a50ca0be45110727a33801fb/lib/util/deterministicGrouping.js#L32-L41