TabletManager: Check for context cancellation in loop within ChangeTabletType() (#9842)
TabletManager: Check for context cancellation in loop within ChangeTabletType() (#9842)

* Check for context cancellation in loop within ChangeTabletType()

Signed-off-by: Rohit Nayak <83d5e1e49bd5f0ebbf6c9ba40416057fac1b5d76@planetscale.com>

* Change error message

Signed-off-by: Rohit Nayak <83d5e1e49bd5f0ebbf6c9ba40416057fac1b5d76@planetscale.com>
vitessio/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,mahak/vitess,vitessio/vitess,mahak/vitess,mahak/vitess,mahak/vitess,mahak/vitess,vitessio/vitess