[turbopack] standardize chunk entry names for webpack and postcss loaders

[lukesandberg]

What?

Use the chunk_path api for computing entrypoint filepath names for our node worker pool files. For postcss loaders ensure that the config filepath is part of the module ident of the transformer.

Why?

I was investigating a bug in reported in next 16.2.6 (https://vercel.slack.com/archives/C09GRCW5MQR/p1780088728756579) and noticed that the chunk entry path construction logic was unusual. It happens to be that #91338 fixed the reported bug (just not released yet). This migrates all entry construction to the standard form

[lukesandberg]

• merge nodejs pools #94320
• [turbopack] standardize chunk entry names for webpack and postcss loaders #94256 👈 (View in Graphite)
• canary

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Failing test suites

Commit: b157db5 | About building and testing Next.js

pnpm test-dev test/e2e/app-dir/instant-navigation-testing-api/instant-navigation-testing-api.test.ts (job)

• instant-navigation-testing-api > renders runtime-prefetched content instantly during navigation (DD)

Expand output

● instant-navigation-testing-api › renders runtime-prefetched content instantly during navigation

locator.waitFor: Timeout 60000ms exceeded.
Call log:
  - waiting for locator('[data-testid="search-param-value"]') to be visible

  105 |         '[data-testid="search-param-value"]'
  106 |       )
> 107 |       await searchParamValue.waitFor({ state: 'visible' })
      |                              ^
  108 |       expect(await searchParamValue.textContent()).toContain(
  109 |         'myParam: testValue'
  110 |       )

  at waitFor (e2e/app-dir/instant-navigation-testing-api/instant-navigation-testing-api.test.ts:107:30)
  at instant (../packages/next-playwright/dist/index.js:50:16)
  at Object.<anonymous> (e2e/app-dir/instant-navigation-testing-api/instant-navigation-testing-api.test.ts:99:5)