Use unique info for the kopia snapshot source information to help
isolate snapshots for different resources from each other. This will
come in handy both for checkpoint snapshots and regular snapshots if
kopia's retention policy happens to look for things.
Integration tests for this probably won't pass until the next PR in
the series is merged into this PR
---
#### Does this PR need a docs update or release note?
- [ ] ✅ Yes, it's included
- [ ] 🕐 Yes, but in a later PR
- [x] ⛔ No
#### Type of change
- [ ] 🌻 Feature
- [x] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Supportability/Tests
- [ ] 💻 CI/Deployment
- [ ] 🧹 Tech Debt/Cleanup
#### Issue(s)
merge after:
* #5091
* #5092
#### Test Plan
- [ ] 💪 Manual
- [x] ⚡ Unit test
- [ ] 💚 E2E
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