Fix roll angle units, issue matplotlib#28256

Pass roll angle to view_init() in degrees (not radians)

lib/mpl_toolkits/mplot3d/axes3d.py

@@ -1524,6 +1524,7 @@ def _on_move(self, event):
             dazim = -(dy/h)*180*np.sin(roll) - (dx/w)*180*np.cos(roll)
             elev = self.elev + delev
             azim = self.azim + dazim
+            roll = self.roll
             vertical_axis = self._axis_names[self._vertical_axis]
             self.view_init(
                 elev=elev,