add community implementation

Type of change

• Bug Fix
• Feature

Does this introduce a change in the core logic?

• [Yes]

Does this introduce a change in the cloud provider implementation, and if so which cloud?

• AWS
• Azure
• GCP
• IBM

Does this introduce a change that must be documented in the README.md file?

• [No]

Updates description?

Add support of the Community implementation when different BlobLoader implementations could be added with using environment variables.

ADR: https://community.opengroup.org/Yan_Sushchynski/rafs-ddms-services-comm-impl/-/issues/1