feat: allow for optional creation of groups

Users might want to further group their pods/nodes/services. There is not a whole lot we can depend on to be true for every pod, otherwise we could make this implicit, so an annotation is probably best to handle this:
```
annotations:
  logicmonitor.com/group: example
```

The group should be created as a child of the group that the resource is a part of, e.g.
```
Pods/example
```