As a template admin, I want to put multiple workspaces on the same root filesystem to simplify my setup of a basic deployment (#3331).

Multiple agents cannot run in the same root for at least the following reasons:

• Since the agent stores logs at a constant location in /tmp, multiple agents would overwrite each others' logs
  • Possible solution: store logs in agent's dir instead of /tmp. This avoids the need for extra configuration.
• There is no way to start an agent as a specific OS user