chore: prune pnpm store before install

[andyjessop]

What this PR solves / how to test

Fixes #000. Attempting to fix Windows flakes.

Author has addressed the following

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• Public documentation
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  • Cloudflare docs PR(s):
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[changeset-bot]

⚠️ No Changeset found

Latest commit: 8acc1a5

Merging this PR will not cause a version bump for any packages. If these changes should not result in a new version, you're good to go. If these changes should result in a version bump, you need to add a changeset.

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[github-actions]

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/11176018749/npm-package-wrangler-6890

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

npm install --save-dev https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/prs/6890/npm-package-wrangler-6890

Or you can use npx with this latest build directly:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/11176018749/npm-package-wrangler-6890 dev path/to/script.js

Additional artifacts:

npx https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/11176018749/npm-package-create-cloudflare-6890 --no-auto-update

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/11176018749/npm-package-cloudflare-kv-asset-handler-6890

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/11176018749/npm-package-miniflare-6890

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/11176018749/npm-package-cloudflare-pages-shared-6890

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/11176018749/npm-package-cloudflare-vitest-pool-workers-6890

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/11176018749/npm-package-cloudflare-workers-editor-shared-6890

npm install https://prerelease-registry.devprod.cloudflare.dev/workers-sdk/runs/11176018749/npm-package-cloudflare-workers-shared-6890

Note that these links will no longer work once the GitHub Actions artifact expires.

---

[email protected] includes the following runtime dependencies:

Package	Constraint	Resolved
miniflare	workspace:*	3.20240925.0
workerd	1.20240925.0	1.20240925.0
workerd --version	1.20240925.0	2024-09-25

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