CTA read support for non-native tape formats (OSM/dCache and Enstore)

• Eric asked for an update from Jorge, about the current status of the CleanerSession fix

cta-frontend-grpc integration for CTA

• Jacek has completed a proff of concep implementation.
• The next steps are:
  1. Integrate cta-frontend-grpc with the common code (to be shared by all cta-frontend implementations) that was developed recently by Michael.
  2. Add support for the cta-admin commands that to not require response (no streaming).
  3. Pick one cta-admin streaming command (for example tape ls) and implement it as proof of concept.