Enable feature importance calculation for the defect/enhancement/task model

bugbug/models/defect_enhancement_task.py

@@ -10,8 +10,6 @@ class DefectEnhancementTaskModel(DefectModel):
     def __init__(self, lemmatization=False, historical=False):
         DefectModel.__init__(self, lemmatization, historical)
 
-        self.calculate_importance = False
-
     def get_labels(self):
         classes = self.get_bugbug_labels("defect_enhancement_task")
 

infra/data-pipeline.yml

@@ -196,6 +196,9 @@ tasks:
           public/metrics.json:
             path: /metrics.json
             type: file
+          public/feature_importance.png:
+            path: /feature_importance.png
+            type: file
 
       routes:
         - notify.email.release-mgmt-analysis@mozilla.com.on-failed"