Turbopack: trace worker_threads worker entry (#85734)
Closes PACK-5688
Closes https://github.com/vercel/next.js/issues/84766
1. Trace `new require("worker_threads").Worker` calls
2. ignore syntax errors in all traced files
This does lead to a build error currently with cargo run --bin turbopack-nft -- --show-issues --graph bench/app-router-server/node_modules/thread-stream/index.js:
```
error - [analysis] [workspace]/node_modules/.pnpm/thread-stream@3.1.0/node_modules/thread-stream/test/syntax-error.mjs
[workspace]/node_modules/.pnpm/thread-stream@3.1.0/node_modules/thread-stream/test/syntax-error.mjs:2:6 Parsing ecmascript source code failed
1 | // this is a syntax error
+ v
2 + import
+ ^
3 |
Expected 'from', got '<eof>'
```
Pulled in by this partly dynamic `new Worker()` call: https://github.com/pinojs/thread-stream/blob/82e011281b8895bf5e8f70008e0242927fcaf0cb/index.js#L53-L55
(Related to https://github.com/vercel/next.js/pull/84408, where this was previously fixed for extensionless files such as `LICENSE`)
