fix(turbopack): Reverse order of css chunks to fix css module issues (#7301)
### Description
I'm not sure if this fix is correct, because the original comment
something wrong.
### Testing Instructions
<img width="1840" alt="image"
src="https://github.com/vercel/turbo/assets/29931815/99cae297-d7c5-45d1-94e3-7d49dbfef788">
With this PR CSS ordering issue of lightningcss is fixed.
Run `TURBOPACK=1 pnpm next dev
test/integration/css-fixtures/composes-ordering`
- Closes PACK-2308