Support `--x-dev-env` for Pages

[penalosa]

What this PR solves / how to test

Fixes DEVX-1296

Author has addressed the following

• Tests
  • [ ] TODO (before merge)
  • [x] Included
  • [ ] Not necessary because:
• E2E Tests CI Job required? (Use "e2e" label or ask maintainer to run separately)
  • [ ] I don't know
  • [x] Required / Maybe required
  • [ ] Not required because:
• Changeset (Changeset guidelines)
  • [x] TODO (before merge)
  • [ ] Included
  • [ ] Not necessary because:
• Public documentation
  • [ ] TODO (before merge)
  • [ ] Cloudflare docs PR(s):
  • [x] Not necessary because: experimental flag

[changeset-bot[bot]]

🦋 Changeset detected

Latest commit: f0345e609d4ad0766fbf95daab441e35cbc08882

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

This PR includes changesets to release 2 packages

| Name | Type | | ------------------------------- | ----- | | wrangler | Patch | | @cloudflare/vitest-pool-workers | Patch |

Not sure what this means? Click here to learn what changesets are.

Click here if you're a maintainer who wants to add another changeset to this PR

[github-actions[bot]]

A wrangler prerelease is available for testing. You can install this latest build in your project with:

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9587067133/npm-package-wrangler-6092

You can reference the automatically updated head of this PR with:

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/prs/6092/npm-package-wrangler-6092

Or you can use npx with this latest build directly:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9587067133/npm-package-wrangler-6092 dev path/to/script.js

Additional artifacts:

```sh npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9587067133/npm-package-create-cloudflare-6092 --no-auto-update ``` ```sh npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9587067133/npm-package-cloudflare-kv-asset-handler-6092 ``` ```sh npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9587067133/npm-package-miniflare-6092 ``` ```sh npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9587067133/npm-package-cloudflare-pages-shared-6092 ``` ```sh npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/9587067133/npm-package-cloudflare-vitest-pool-workers-6092 ``` Note that these links will no longer work once [the GitHub Actions artifact expires](https://docs.github.com/en/organizations/managing-organization-settings/configuring-the-retention-period-for-github-actions-artifacts-and-logs-in-your-organization).

---

wrangler@3.61.0 includes the following runtime dependencies:

Package	Constraint	Resolved
miniflare	workspace:*	3.20240610.1
workerd	1.20240610.1	1.20240610.1
workerd --version	1.20240610.1	2024-06-10

Please ensure constraints are pinned, and miniflare/workerd minor versions match.