three changes
1. bumps the xsync package to v3
2. creates a common package for synced maps
3. replaces all xsync MapOf imports with the new common/syncd package.
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#### Does this PR need a docs update or release note?
- [x] ⛔ No
#### Type of change
- [x] 🧹 Tech Debt/Cleanup
#### Test Plan
- [x] ⚡ Unit test
- [x] 💚 E2E