Handle missing case in reestablish local commitment number checks

Handle missing case in reestablish local commitment number checks

If we're behind exactly one commitment (which we've revoked), we'd
previously force-close the channel, guaranteeing we'll lose funds
as the counterparty has our latest local commitment state's
revocation secret.

While this shouldn't happen because users should never lose data,
sometimes issues happen, and we should ensure we always panic.

Further, `test_data_loss_protect` is updated to test this case.