## Description
Make a separate interface for fetching drive information from Graph API. Interface allows for better testing via mocks
Merges SharePoint and OneDrive code for getting drives.
Also fixes potential bug where not all drives would be fetched. This could have occurred because the previous implementation for both SharePoint and OneDrive were not checking for paginated results
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## Does this PR need a docs update or release note?
- [x] ✅ Yes, it's included
- [ ] 🕐 Yes, but in a later PR
- [ ] ⛔ No
## Type of change
- [ ] 🌻 Feature
- [ ] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [x] 🤖 Test
- [ ] 💻 CI/Deployment
- [x] 🧹 Tech Debt/Cleanup
## Issue(s)
* #2264
## Test Plan
- [ ] 💪 Manual
- [x] ⚡ Unit test
- [ ] 💚 E2E
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