Fix Turbopack worker chunk loading with asset prefix (#96636)
## Summary
- propagate the effective worker asset prefix through the worker
bootstrap so runtime chunk registration and loading use the same base
path
- verify workers execute with both explicit and empty
`turbopackWorkerAssetPrefix` overrides
- add coverage for the Resvg WASM worker reproduction
Fixes #96613
## Verification
- `NEXT_TEST_PREFER_OFFLINE=1 pnpm test-start-turbo
test/e2e/turbopack-worker-asset-prefix/turbopack-worker-asset-prefix.test.ts`
- `NEXT_TEST_PREFER_OFFLINE=1 pnpm test-dev-turbo
test/e2e/turbopack-worker-asset-prefix/turbopack-worker-asset-prefix.test.ts`
- Resvg WASM worker test in production and development Turbopack
- focused `turbopack-tests` worker and ignore-comments snapshots
- `pnpm swc-build-native`
- Full `pnpm build-all` did not complete locally because of unrelated
existing `httpxy` and proxy-request type errors
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Co-authored-by: Tobias Koppers <tobias.koppers@googlemail.com>
