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/workflows/iptrunk/terminate_iptrunk.py

-# noinspection PyProtectedMember
 import ipaddress
 
 from orchestrator.forms import FormPage
 from orchestrator.forms.validators import Label
 from orchestrator.targets import Target
 from orchestrator.types import FormGenerator, State, SubscriptionLifecycle, UUIDstr
-from orchestrator.workflow import StepList, done, init, step, workflow
+from orchestrator.workflow import StepList, conditional, done, init, step, workflow
 from orchestrator.workflows.steps import resync, set_status, store_process_subscription, unsync
 from orchestrator.workflows.utils import wrap_modify_initial_input_form
 
@@ -15,17 +14,21 @@ from gso.services.ipam import V4ServiceNetwork, V6ServiceNetwork
 from gso.services.provisioning_proxy import pp_interaction
 
 
-def initial_input_form_generator(subscription_id: UUIDstr) -> FormGenerator:
-    subscription = Iptrunk.from_subscription(subscription_id)
-
+def initial_input_form_generator() -> FormGenerator:
     class TerminateForm(FormPage):
-        are_you_sure: Label = f"Are you sure you want to remove {subscription.description}?"  # type: ignore
+        termination_label: Label = (
+            "Please confirm whether configuration should get removed from the A and B sides of the trunk, and whether "
+            "IPAM resources should be released."  # type: ignore
+        )
+        remove_configuration: bool = True
+        clean_up_ipam: bool = True
 
-    return TerminateForm  # type: ignore
+    user_input = yield TerminateForm
+    return user_input.dict()
 
 
 @step("Set iptrunk ISIS metric to 9000")
-def modify_iptrunk_subscription(subscription: Iptrunk) -> State:
+def update_isis_metric(subscription: Iptrunk) -> State:
     subscription.iptrunk.iptrunk_isis_metric = 9000
 
     return {"subscription": subscription}
@@ -87,15 +90,23 @@ def deprovision_ip_trunk_ipv6(subscription: Iptrunk) -> dict[str, V4ServiceNetwo
     target=Target.TERMINATE,
 )
 def terminate_iptrunk() -> StepList:
+    run_config_steps = conditional(lambda state: state.get("remove_configuration", True))
+    run_ipam_steps = conditional(lambda state: state.get("clean_up_ipam", True))
+
+    config_steps = (
+        StepList([update_isis_metric])
+        >> pp_interaction(drain_traffic_from_ip_trunk, 3)
+        >> pp_interaction(deprovision_ip_trunk_dry, 3)
+        >> pp_interaction(deprovision_ip_trunk_real, 3)
+    )
+    ipam_steps = StepList([deprovision_ip_trunk_ipv4, deprovision_ip_trunk_ipv6])
+
     return (
         init
         >> store_process_subscription(Target.TERMINATE)
         >> unsync
-        >> modify_iptrunk_subscription
-        >> pp_interaction(drain_traffic_from_ip_trunk, 3)
-        >> pp_interaction(deprovision_ip_trunk_dry, 3)
-        >> deprovision_ip_trunk_ipv4
-        >> deprovision_ip_trunk_ipv6
+        >> run_config_steps(config_steps)
+        >> run_ipam_steps(ipam_steps)
         >> set_status(SubscriptionLifecycle.TERMINATED)
         >> resync
         >> done