fix read-data timer when ignore_data_skip=False and skip_profile_timer=False (#8177)

Author: GuoxiaWang

paddlenlp/trainer/trainer.py

@@ -921,6 +921,7 @@ def _inner_training_loop(
                         steps_trained_progress_bar.update(1)
                     if steps_trained_in_current_epoch == 0:
                         self._load_rng_state(resume_from_checkpoint)
+                    self.timers and self.timers("read-data").start()
                     continue
                 elif steps_trained_progress_bar is not None:
                     steps_trained_progress_bar.close()