We've found that it's possible to get malformed JSON back from
the graph server and graph SDK. This results in errors while trying
to deserialize objects that are malformed JSON
This adds a simple JSON sanitizer and tests to make sure that even if
graph and the graph SDK happen to generate malformed JSON we can get
back to a state where we can deserialize it again. The tests also
print info when the received content differs from the original
This PR does not change any of the logic that corso uses during
backups or restores, it just adds sanitization code and tests
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#### 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
- [x] 🤖 Supportability/Tests
- [ ] 💻 CI/Deployment
- [ ] 🧹 Tech Debt/Cleanup
#### Test Plan
- [x] 💪 Manual
- [x] ⚡ Unit test
- [ ] 💚 E2E
