Remove references to old setting (#8018)

* Remove references to old setting

- Now offloaded to plugins

* Remove REPORT_ENABLE_TEST_REPORT setting

* Cleanup

* Add new boolean setting to control whether reports are attached automatically

* Attach generated report to model instance

* Update unit testing

* Bump API version

tasks.py

@@ -1184,7 +1184,7 @@ def frontend_build(c):
 
 
 @task
-def frontend_dev(c):
+def frontend_server(c):
     """Start frontend development server.
 
     Args:
@@ -1447,7 +1447,7 @@ def clear_generated(c):
 development = Collection(
     delete_data,
     docs_server,
-    frontend_dev,
+    frontend_server,
     gunicorn,
     import_fixtures,
     schema,
@@ -1458,6 +1458,7 @@ development = Collection(
     test_translations,
     translate,
 )
+
 internal = Collection(
     clean_settings,
     clear_generated,
@@ -1474,6 +1475,7 @@ internal = Collection(
     translate_stats,
     worker,
 )
+
 ns = Collection(
     backup,
     export_records,
@@ -1490,5 +1492,6 @@ ns = Collection(
     version,
     wait,
 )
+
 ns.add_collection(development, 'dev')
 ns.add_collection(internal, 'int')