turbo

c604be7a - Chunking Context Refactor pt. 3: Address PR comments from pt. 2 (#4546)

Chunking Context Refactor pt. 3: Address PR comments from pt. 2 (#4546) ### Description This PR does two things, addressing related comments from https://github.com/vercel/turbo/pull/4450: 1. Replace `ChunkReferenceVc` and `ParallelChunkReferenceVc` with `Chunk::parallel_chunks`. 2. Moves all non-generic optimization logic out of `turbopack-core` and into `turbopack-dev`. These optimization methods are very specific to a development environment, and `turbopack-build` will have different ones. ### Testing Instructions Snapshots link WEB-891