Revamp snapshot tests (#2351)
* Disable HMR for snapshot tests
The only effect is that we don't emit source maps for the individual chunk items, reducing the total number of output files considerably.
* Extract snapshot tests into separate crate
* Strip annoying file hash fingerprints
* Reduce deps
* Update old references to turbopack/test/snapshot
* Move node_modules out of snapshot dir
* Only un-fingerprint EcmascriptChunkSourceMapAssetVc source maps
* Fix gitignore
* Remove dbg
* TAPLO
* Apply suggestions from code review
Co-authored-by: Alex Kirszenberg <a.kirszenberg@gmail.com>
* Use eprintln
Co-authored-by: Alex Kirszenberg <a.kirszenberg@gmail.com>
