## Description
When we do a new backup, we look up the old permissions assuming they are accurate, but the permissions from the previous backup might be incorrect as we may have run it with permissions backup disabled.
It can also happen the other way round where even if we ask it to disable permissions backup, it can still end up having permissions which are pulled from the previous backup.
This fixes this behavior by setting the mod time for the backup info to the current time.
- [x] Add tests
- [x] Address TODOs in the 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
<!--- Please check the type of change your PR introduces: --->
- [ ] 🌻 Feature
- [x] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Test
- [ ] 💻 CI/Deployment
- [ ] 🧹 Tech Debt/Cleanup
## Issue(s)
<!-- Can reference multiple issues. Use one of the following "magic words" - "closes, fixes" to auto-close the Github issue. -->
* fixes https://github.com/alcionai/corso/issues/2472
## Test Plan
<!-- How will this be tested prior to merging.-->
- [ ] 💪 Manual
- [x] ⚡ Unit test
- [ ] 💚 E2E
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