Should not error out on "My site not found" (#3469)

This code should not error out on `Unable to retrieve user's mysite URL`.

---

#### 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
- [ ] 🤖 Supportability/Tests
- [ ] 💻 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. -->
* #<issue>

#### Test Plan

<!-- How will this be tested prior to merging.-->
- [x] 💪 Manual
- [x] ⚡ Unit test
- [x] 💚 E2E

src/pkg/services/m365/m365.go

@@ -121,7 +121,8 @@ func UserHasDrives(ctx context.Context, acct account.Account, userID string) (bo
 		}
 
 		if !graph.IsErrExchangeMailFolderNotFound(err) ||
-			clues.HasLabel(err, graph.LabelStatus(http.StatusNotFound)) {
+			clues.HasLabel(err, graph.LabelStatus(http.StatusNotFound)) ||
+			clues.HasLabel(err, graph.LabelsMysiteNotFound) {
 			return false, err
 		}