make micro bsz configurable (PaddlePaddle#52447)

Author: zhaoyinglia

python/paddle/distributed/auto_parallel/parallelizer_v2.py

@@ -155,14 +155,19 @@ def parallel(self, rank):
                     time.time() - time0, self._mode
                 )
             )
+            micro_bsz = (
+                1
+                if not self._strategy.pipeline.enable
+                else self._strategy.pipeline.micro_batch_size
+            )
             time0 = time.time()
             resharder = Resharder(
                 dist_main_prog,
                 dist_startup_prog,
                 rank,
                 self._dist_context,
                 [],
-                1,
+                micro_bsz,
             )
             resharder.reshard()
             self._logger.debug(