[Bug] Breaks trying to remove a subsystem when stack is removed before the subsystem is removed

[2gn]

Steps to reproduce

1. Create a stack
2. Create a subsystem with the stack
3. Remove the stack
4. Try to remove the subsystem

It emits the error stack not found and the subsystem won't be removed, but disappears from the list.
And when you try to create another subsystem with the same name, it won't be made.

[taukakao]

While this is clearly a bug that should be fixed. You can still delete the container by running:
podman rm apx-NAME
of course replacing "NAME" with the actual name of the subsystem like "mycontainer"

[jardon]

i see two bugs here:

1. stacks should only be allowed to be removed if there are no subsystems that are built on it
2. a subsystem shouldnt be removed from apx if the container hasnt been destroyed