`arctl agent run` creates an empty folder structure when running from registry

[peterj]

arctl agent init adk python myagent    
arctl agent build . --push
arctl agent publish . --version 0.1.0

Delete the myagent folder, and run the agent from the registry arctl agent run myagent. Close the chat, then check the folder:

~/projects/emptyfolder  09:56:29  
❯  tree  
.
└── myagent
    └── 0.1.0

A myagent/0.1.0 folder is created -- if you try to run the agent again, it will fail now because run thinks we're trying to run an agent from a local folder (which is empty). We need to investigate where/why/when that empty folder structure gets created, why is it needed and prevent it from being created and/or delete it if it's not needed.