[Stride] Open DenseTensorIterator Flag (#75884)

* open flag

* refine

* refine

* refine

* refine

* refine

Author: Eddie-Wang1120

paddle/common/flags.cc

@@ -2275,7 +2275,7 @@ PHI_DEFINE_EXPORTED_bool(use_default_stream,
  * Note: Whether use Stride_Compute_Kernel.
  */
 PHI_DEFINE_EXPORTED_bool(use_stride_compute_kernel,
-                         false,
+                         true,
                          "Whether use Stride_Compute_Kernel.");
 
 /**