[checkpointio] support non blocking pin load (#6172)

* [checkpointio] support non blocking pin load

* [pre-commit.ci] auto fixes from pre-commit.com hooks

for more information, see https://pre-commit.ci

---------

Co-authored-by: pre-commit-ci[bot] <66853113+pre-commit-ci[bot]@users.noreply.github.com>

colossalai/checkpoint_io/moe_checkpoint.py

@@ -510,7 +510,14 @@ class MoECheckpointIO(HybridParallelCheckpointIO):
                         f"index located at {final_index_file_path}."
                     )
 
-    def load_sharded_optimizer(self, optimizer: OptimizerWrapper, checkpoint_index_file: str, prefix: str = ""):
+    def load_sharded_optimizer(
+        self,
+        optimizer: OptimizerWrapper,
+        checkpoint_index_file: str,
+        prefix: str = "",
+        low_cpu_mem_mode: bool = True,
+        num_threads: int = 1,
+    ):
         """
         Load sharded optimizer with the given path to index file of checkpoint folder.
 
@@ -795,7 +802,14 @@ class MoECheckpointIO(HybridParallelCheckpointIO):
         dist.barrier()
 
     # Copied from colossalai.moe
-    def load_unsharded_optimizer(self, optimizer: OptimizerWrapper, checkpoint: str, strict: bool = False):
+    def load_unsharded_optimizer(
+        self,
+        optimizer: OptimizerWrapper,
+        checkpoint: str,
+        strict: bool = False,
+        low_cpu_mem_mode: bool = True,
+        num_threads: int = 1,
+    ):
         """
         Load optimizer from a file with given path.