GitLab

* Added code to support multiple-file-support feature and removed single-file-support code

1. Added code to read dataset in multiple-file-format
2. Removed code for single-file format

* added files missing in the previous commit

This commit includes dataset_utils.py, which reads the dataset in multiple-file-format, gloo_wrapper function calls to support exchanging dictionaries as objects and helper functions in utils.py

* Update convert_partition.py

Updated function call "create_metadata_json" file to include partition_id so that each rank only creates its own metadata object and later on these are accumulated on rank-0 to create graph-level metadata json file.

* addressing code review comments during the CI process

code changes resulting from the code review comments received during the CI process.

* Code reorganization

Addressing CI comments and code reorganization for easier understanding.

* Removed commented out line

removed commented out line.