fix: Update DPO and SFT configs to use dtensor (#256)

Signed-off-by: ashors1 <[email protected]>

Author: ashors1

examples/configs/dpo.yaml

@@ -46,7 +46,7 @@ policy:
   activation_checkpointing_enabled: false
 
   dtensor_cfg:
-    enabled: false
+    enabled: true
     cpu_offload: False
     sequence_parallel: false
     activation_checkpointing: false

examples/configs/sft.yaml

@@ -33,7 +33,7 @@ policy:
   activation_checkpointing_enabled: false
 
   dtensor_cfg:
-    enabled: false
+    enabled: true
     cpu_offload: False
     sequence_parallel: false
     activation_checkpointing: false