Implement Workflow Registration

[kalxas]

Description

Continue work to define the Workflow Metadata Profile. Extend Registration API to support registration of workflows in Resource Catalogue.

Acceptance criteria

• [ ] Registration API supports registration of workflows in Resource Catalogue
• [ ] A test is available showing that a workflow can be registered in the develop-cluster

Contributes to

• https://github.com/EOEPCA/roadmap/issues/239