Run (something like?) the bot directly on existing multipatch job?

ecelgp in a comment on the parent task raised this idea, which I think I worth this new sub-task to discussion that further in its own right here:

I wonder whether we could enhance the existing multipatch job to:

• Get a topic and figure out the patch-list (same you do in your bot).
• Send an automatic mail when a project build fails (same we do for AR failure).

I also wonder whether the above could be done by just running a bash/python script from jenkins.