chore: rewrite tests to use unstable_dev

[rozenmd]

[changeset-bot[bot]]

⚠️ No Changeset found

Latest commit: d7eb44baeaa6cba0eaaee6789b9b803b25791dba

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[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.developers.workers.dev/runs/2648809953/npm-package-wrangler-1430

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

npm install --save-dev https://prerelease-registry.developers.workers.dev/prs/1430/npm-package-wrangler-1430

Or you can use npx with this latest build directly:

npx https://prerelease-registry.developers.workers.dev/runs/2648809953/npm-package-wrangler-1430 dev path/to/script.js

[rozenmd]

Investigating test failures here: https://github.com/cloudflare/wrangler2/issues/1432

[rozenmd]

Implemented these tests in this PR: https://github.com/cloudflare/wrangler2/pull/1538 - closing this PR