chore: Run C3 e2e tests on every OS only if both every-os and c3-e2e labels are applied

[CarmenPopoviciu]

e2e tests are run on every OS if both the e2e and every-os labels are set. The same is not true atm for C3 e2e tests. This PR fixes that.

Fixes n/a

---

• Tests
  • TODO (before merge)
  • Tests included
  • Tests not necessary because: GH workflow changes
• Wrangler / Vite E2E Tests CI Job required? (Use "e2e" label or ask maintainer to run separately)
  • I don't know
  • Required
  • Not required because: GH workflow changes
• Public documentation
  • TODO (before merge)
  • Cloudflare docs PR(s):
  • Documentation not necessary because: GH workflow changes
• Wrangler V3 Backport
  • TODO (before merge)
  • Wrangler PR:
  • Not necessary because: GH workflow changes

[changeset-bot]

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Latest commit: 95d8463

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commit: 95d8463