feat: add approval restrictions

[l-qing]

Changes

feat: add approval restrictions requiresDifferentApprover

Submitter Checklist

As the author of this PR, please check off the items in this checklist:

• spec PR link included
  • https://github.com/katanomi/spec/pull/174
• Follows the commit message standard
• Meets the contributing guidelines (including
  functionality, content, code)
• Test cases with documentation and functionality works as expected using current and related github repos (MUST deploy and check)
• Release notes block below has been filled in or deleted (only if no user facing changes)

[alaudabot]

Quality Gate

_{updated at Mon Sep 19 10:22:51 UTC 2022}

Status: OK 🟢

Metric	Rating
🐛 Bugs: 0	🏗 Reliability: A 🟢
🤮 Code smells: 0	🛠 Maintainability: A 🟢
⚠️ Vulnerabilities: 0	🦺 Security: A 🟢
🔥 Security hotspots: 0	🔎 Security Review: A 🟢

Metric	Change set	Target (main)	After
🧪 Code coverage	96.88% Coverage on 32 new lines	51.50%	51.30% ⬇️ 🔴 estimated after merge allowed difference 0
👥 Duplications	0.00% Duplications on 0 new lines	0.20%	0.20% ↔️ 🟢 estimated after merge allowed difference 0

• ⚠️ Coverage change not allowed

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