Helper Functions for Artifact Management

[tatiana]

Introduce helper functions in Cosmos to facilitate artifact management. These functions would allow users to specify a list of files (from the temporary directory’s target folder) to upload to a remote store. For Airflow 2.8+, we could utilize Airflow’s Object Store integration for this purpose, with a fallback implementation for older versions that uses provider-specific hooks (e.g., S3, GCS, Azure). This abstraction would simplify artifact handling for users.