Add additional platform capability

[jrknezha]

Add the ability to use a different platform, such as NASA's archives, to inventory. For users, this will allow an additional option in the yaml for the 'platform' key.

Files which will need to be created or updated:

• Relevant interface if not aws_s3 or hpss (see aws_s3_interface.py and hpss_io_interface.py for examples)
• Add the new platform to obs_storage_platforms.py
• Add appropriate 'process' function to search_engine.py (such as process_inspect_tarball_resp() or process_aws_s3_clean_resp() )
• Add appropriate 'post' function to search_engine.py (such as post_hpss_cmd_result())
• In search_engine.py, update the ObsInventorySearchEngine.get_obs_file_info() to handle the new platform
• Add relevant test file if adding a new interface

Optional: create a relevant version of the obs_inv_utils_hera.sh script for the applicable system to setup the necessary modules for running