Add ROS bag backup support

[hect95]

• Introduced S3RosbagBackupAgent for managing S3 backups of
  rosbag recordings
  • Use multiprocessing.Process to run a parallel
    process _backup_routine() to periodically check
    a queue for ROSbag directories to back up
    • The module is designed to be used as a non-blocking operation,
      thus the need for a queue in case multiple directories are added
      at once, or if another upload is in progress.
  • Defined enqueue() method to add new directories to the queue
    and trigger the backup process routine if necessary.
  • Support standalone execution via main() function which parses
    command line arguments for configuration and running the agent.
    • Accept a list of ROSbag recordings with --recordings_list arg
    • Accept a --debug flag to enable debug logging
    • Accept a --dryrun flag to simulate the backup process
      without uploading files
  • Add s3_backup_agent to pyproject.toml to enable pip installation
    • Define a s3_backup_agent command

Allow files 5GB+ to be uploaded to S3

• Use boto3 TransferConfig to set multipart upload threshold
  to allow ROS bag splits larger than 5GB to be uploaded to S3.
  • Define a default threshold of 3 GB and use up to 4 parallel workers
• Change boto3.resource('s3') to boto3.client('s3')
  to allow for multipart uploads with TransferConfig.
• Set TODO comments with issue number for future reference.

Add the S3 backup agent to the DataManager pipeline

[GreatAlexander]

Looks good! The tiniest of comments plz! 🙏 🚀