feat: filter live e2e tests to only published templates

[deloreyj]

Description

This PR filters the templates we attempt to test when running the test:live:e2e command to only run against the templates that have live previews in the Cloudflare Dashboard.

Also fixes an issue where the live multiplayer globe template may have multiple users connected when the test runs.

Checklist

• Template Metadata
  • template directory ends with -template
  • "cloudflare" section of package.json is populated
  • template preview image uploaded to Images
  • README is populated and uses <!-- dash-content-start --> and <!-- dash-content-end --> to designate the Dash readme preview
  • package.json contains a deploy command

Example package.json

"cloudflare": {
  "label": "Worker + D1 Database",
  "products": [
    "Workers",
    "D1"
  ],
  "categories": [
    "storage"
  ],
  "docs_url": "https://developers.cloudflare.com/d1/",
  "preview_image_url": "https://imagedelivery.net/wSMYJvS3Xw-n339CbDyDIA/cb7cb0a9-6102-4822-633c-b76b7bb25900/public"
}

[github-actions]

Dashboard preview link