Bug 1643817: Use a fresh taskgroup for create-interactive tasks; r=Callek

In Bug 1641971 (e7d4c490c31a) we changed `taskgraph.create.create_tasks` to
always get the decision task id to use. However, the call in create-interactive
passed `None`, expecting to have on generated. This changes that to use the
`create-interactive`s action task as the task id.

Differential Revision: https://phabricator.services.mozilla.com/D82652

taskcluster/taskgraph/actions/create_interactive.py

@@ -7,6 +7,7 @@
 from __future__ import absolute_import, print_function, unicode_literals
 
 import logging
+import os
 import re
 import taskcluster_urls
 
@@ -156,8 +157,9 @@ def create_interactive_action(parameters, graph_config, input, task_group_id, ta
 
     # Create the task and any of its dependencies. This uses a new taskGroupId to avoid
     # polluting the existing taskGroup with interactive tasks.
+    action_task_id = os.environ.get('TASK_ID')
     label_to_taskid = create_tasks(graph_config, [label], full_task_graph, label_to_taskid,
-                                   parameters, modifier=edit)
+                                   parameters, decision_task_id=action_task_id, modifier=edit)
 
     taskId = label_to_taskid[label]
     logger.info('Created interactive task {}; sending notification'.format(taskId))

taskcluster/taskgraph/actions/util.py

@@ -241,7 +241,7 @@ def update_dependencies(task, graph):
 
 
 def create_tasks(graph_config, to_run, full_task_graph, label_to_taskid,
-                 params, decision_task_id=None, suffix='', modifier=lambda t: t):
+                 params, decision_task_id, suffix='', modifier=lambda t: t):
     """Create new tasks.  The task definition will have {relative-datestamp':
     '..'} rendered just like in a decision task.  Action callbacks should use
     this function to create new tasks,