🐛 BUG: Dynamic variable chunk imports aren't found when using _worker.js/ directory

[GregBrimble]

Which Cloudflare product(s) does this pertain to?

Pages

What version of Wrangler are you using?

latest

What operating system are you using?

macOS

Describe the Bug

Related to #2966.

If you wrangler pages dev ./dist where ./dist/_worker.js/index.js dynamically imports a chunk (e.g. await import(url.pathname), the chunk cannot be found. This is because the copy-modules-over-to-the-temporary-working-directory-where-we-build-functions logic is only run in bundle mode when collecting modules. We need to also copy over any additional modules that were discovered in the traversing of the module graph that ran first.

This doesn't affect prod.