A bunch of places where we missed handling groups
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Only code movement, no code changes.
Moved services to `/internal/m365/services/{onedrive,sharepoint,exchange}`
Moved collections to `/internal/m365/collection/{drive,site}`
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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
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- [ ] 🌻 Feature
- [ ] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Supportability/Tests
- [ ] 💻 CI/Deployment
- [x] 🧹 Tech Debt/Cleanup
#### Issue(s)
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#### Test Plan
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renames /internal/connector to /internal/m365. No logic changes in this PR. Only the dir rename, import renames, and one linter shadowing rename.
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#### Does this PR need a docs update or release note?
- [x] ⛔ No
#### Type of change
- [x] 🧹 Tech Debt/Cleanup
#### Issue(s)
* #1996
#### Test Plan
- [x] ⚡ Unit test
- [x] 💚 E2E
