Create output directories when converting bert checkpoint.

PiperOrigin-RevId: 323827690

official/nlp/bert/tf2_encoder_checkpoint_converter.py

@@ -73,6 +73,7 @@ def _create_bert_model(cfg):
 def convert_checkpoint(bert_config, output_path, v1_checkpoint):
   """Converts a V1 checkpoint into an OO V2 checkpoint."""
   output_dir, _ = os.path.split(output_path)
+  tf.io.gfile.makedirs(output_dir)
 
   # Create a temporary V1 name-converted checkpoint in the output directory.
   temporary_checkpoint_dir = os.path.join(output_dir, "temp_v1")