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1. Renamed `IsBackupRunnable` to `IsServiceEnabled` & extended to restore operation. Removed `checkServiceEnabled`. Reasons:
- The above 2 functions were doing the same thing. Removed `checkServiceEnabled` in favor of `IsBackupRunnable` since we want this check to be as soon as possible during backup/restore op initialization
- Renamed `IsBackupRunnable` to `IsServiceEnabled`, because a) we are only doing service enabled checks right now, b) common code that can be used for both restore & backup.
2. Wire corso code to use new helpers in internal/m365/common.go
3. Note: SDK wiring and related integ tests will be added in a follow up PR
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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
<!--- Please check the type of change your PR introduces: --->
- [ ] 🌻 Feature
- [ ] 🐛 Bugfix
- [ ] 🗺️ Documentation
- [ ] 🤖 Supportability/Tests
- [ ] 💻 CI/Deployment
- [x] 🧹 Tech Debt/Cleanup
#### Issue(s)
<!-- Can reference multiple issues. Use one of the following "magic words" - "closes, fixes" to auto-close the Github issue. -->
* https://github.com/alcionai/corso/issues/3844
#### Test Plan
<!-- How will this be tested prior to merging.-->
- [ ] 💪 Manual
- [x] ⚡ Unit test
- [ ] 💚 E2E
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