Implements support for python_modules for packages in Python Workers

[dom96]

Fixes EW-9326

We don't want the vendored packages to live in src/vendor anymore, instead we want them to be similar to node_modules. This PR implements this but retains support for src/vendor for now, with an error being thrown if both directories are present.

---

• Tests
  • Tests included
  • Tests not necessary because:
• Public documentation
  • Cloudflare docs PR(s):
  • Documentation not necessary because: not a public facing feature
• Wrangler V3 Backport
  • Wrangler PR:
  • Not necessary because: beta product

Test Plan

$ pnpm run test --filter wrangler -- -t "should print vendor modules correctly in table" src/__tests__/deploy.test.ts

[changeset-bot]

🦋 Changeset detected

Latest commit: 703d498

The changes in this PR will be included in the next version bump.

This PR includes changesets to release 3 packages

Name	Type
wrangler	Minor
@cloudflare/vite-plugin	Major
@cloudflare/vitest-pool-workers	Patch

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[pkg-pr-new]

create-cloudflare

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@cloudflare/kv-asset-handler

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miniflare

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@cloudflare/pages-shared

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@cloudflare/unenv-preset

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@cloudflare/vite-plugin

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@cloudflare/vitest-pool-workers

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@cloudflare/workers-editor-shared

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wrangler

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commit: 703d498