feat: allow user to configure logLevel on vitest-pool-workers

[sheplu]

Fixes #12014

Add a new parameter to allow logLevel threshold on the vitest-pool-workers allowing to hide debug messages like vpw:debug

I don't think the failling CI is due to the change I did

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• Tests
  • Tests included/updated
  • Automated tests not possible - manual testing has been completed as follows:
  • Additional testing not necessary because:
• Public documentation
  • Cloudflare docs PR(s): doc: add logLevel for vitest-pool-worker cloudflare-docs#29210
  • Documentation not necessary because:

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[changeset-bot]

🦋 Changeset detected

Latest commit: d55253d

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[workers-devprod]

Codeowners approval required for this PR:

• @cloudflare/wrangler

Show detailed file reviewers

• packages/vitest-pool-workers/src/pool/cloudflare-pool-worker.ts: [@cloudflare/wrangler]
• packages/vitest-pool-workers/src/pool/config.ts: [@cloudflare/wrangler]
• packages/vitest-pool-workers/src/pool/index.ts: [@cloudflare/wrangler]
• packages/vitest-pool-workers/test/log-level.test.ts: [@cloudflare/wrangler]

[devin-ai-integration]

✅ Devin Review: No Issues Found

Devin Review analyzed this PR and found no potential bugs to report.

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commit: d55253d