merge queue: embarking unstable (266b241) and #4718 together

[mergify]

🎉 This pull request has been checked successfully and will be merged soon. 🎉

Branch unstable (266b241) and #4718 are embarked together for merge.

This pull request has been created by Mergify to speculatively check the mergeability of #4718.
You don't need to do anything. Mergify will close this pull request automatically when it is complete.

Required conditions of queue default for merge:

• check-success=local-testnet-success
• check-success=test-suite-success

Required conditions to stay in the queue:

• #approved-reviews-by >= 1
  • Modularize beacon node backend #4718
• check-success=license/cla
  • Modularize beacon node backend #4718
• check-success=target-branch-check
  • Modularize beacon node backend #4718

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previous_failed_batches: []
pull_requests:
  - number: 4718
...

[CLAassistant]

Thank you for your submission! We really appreciate it. Like many open source projects, we ask that you all sign our Contributor License Agreement before we can accept your contribution.
2 out of 3 committers have signed the CLA.

✅ eserilev
✅ michaelsproul
❌ mergify[bot]
_{You have signed the CLA already but the status is still pending? Let us recheck it.}