AST-570 Use separate yml file for SKA repo
Since the SKA repo needs a SKA-specific yml include, use a different yml file for the SKA repo.
Clean up all checks for SKA or Astron repo, and put common jobs in a common yml file.
Since the SKA repo needs a SKA-specific yml include, use a different yml file for the SKA repo.
Clean up all checks for SKA or Astron repo, and put common jobs in a common yml file.