Automate addition and updates of workflows.yml from IWC source manifest

[MillenniumFalconMechanic]

[d-callan]

Do we already have an issue for updating workflow names and descriptions in iwc? It feels a prereq to this but I don't remember seeing one.

[mvdbeek]

I have done most of that already, https://github.com/galaxyproject/iwc/pulls?q=is%3Apr+label%3Awebsite+is%3Aclosed.