Continue reconciling Azure SQL managed users for unknown errors (#1336)

These could be setup issues like the AAD admin not being set on the
server - giving up immediately means the only way to get the user
created successfully is to edit the resource to remove the finalizer,
delete it, then re-add. The reconcile loop for regular users doesn't
use this pattern of returning true, nil when it can't reach the server.

pkg/resourcemanager/azuresql/azuresqlmanageduser/azuresqlmanageduser_reconcile.go

@@ -81,9 +81,8 @@ func (s *AzureSqlManagedUserManager) Ensure(ctx context.Context, obj runtime.Obj
 			return false, nil
 		}
 
-		// Other failures are terminal
 		instance.Status.SetFailedProvisioning(instance.Status.Message)
-		return true, nil
+		return false, nil
 	}
 
 	userExists, err := s.UserExists(ctx, db, requestedUsername)