Launcher should have better support for powershell cmdlet tables

[directionless]

To better support windows, we should expand our dataflatten exec pattern to include powershell cmdlet. I suspect this will have 2 parts:

1. Handling the exec path
2. Parsing the object without needing a toJson pipeline

I'm imagining something akin to dataflattentable.TablePluginExec but that knows how to parse the object data out of powershell without toJson

We might also find there's a better pattern for us.