show progressbar only on progress_rank 0 on ddp_slurm (#4437)

Co-authored-by: chaton <thomas@grid.ai>
Co-authored-by: Adrian Wälchli <aedu.waelchli@gmail.com>

pytorch_lightning/accelerators/ddp_slurm_accelerator.py

@@ -123,7 +123,7 @@ def ddp_train(self, process_idx, model):
         self.set_world_ranks(process_idx)
 
         # toggle prog bar
-        if self.trainer.global_rank == 0 and self.trainer.progress_bar_callback is not None:
+        if self.trainer.global_rank != 0 and self.trainer.progress_bar_callback is not None:
             self.trainer.progress_bar_callback.disable()
 
         # set warning rank