update intake form of device termination workflow

added two checkboxes that take care of removing config, and cleaning up IPAM made the corresponding steps in the workflow conditional, so they are skipped if unchecked

@simone.spinelli let me know whether this is what you had in mind

gso/services/provisioning_proxy.py

@@ -203,6 +203,10 @@ def _confirm_pp_results(state: State) -> FormGenerator:
     :return: Confirmation from the user, when presented with the run results.
     :rtype: {class}`orchestrator.types.FormGenerator`
     """
+    if "pp_run_results" not in state:
+        # FIXME: dirty hack that makes the skipping """work"""
+        return {"pp_did_succeed": True}
+
     successful_run = state["pp_run_results"]["return_code"] == 0
 
     class ConfirmRunPage(FormPage):