Add code testing to some workers

These workers should have the code_testing feature category.

app/workers/all_queues.yml

@@ -1086,7 +1086,7 @@
   :idempotent: true
   :tags: []
 - :name: pipeline_background:ci_daily_build_group_report_results
-  :feature_category: :continuous_integration
+  :feature_category: :code_testing
   :has_external_dependencies:
   :urgency: :low
   :resource_boundary: :unknown
@@ -1094,7 +1094,7 @@
   :idempotent: true
   :tags: []
 - :name: pipeline_background:ci_pipeline_artifacts_coverage_report
-  :feature_category: :continuous_integration
+  :feature_category: :code_testing
   :has_external_dependencies:
   :urgency: :low
   :resource_boundary: :unknown

app/workers/ci/daily_build_group_report_results_worker.rb

@@ -5,6 +5,8 @@ module Ci
     include ApplicationWorker
     include PipelineBackgroundQueue
 
+    feature_category :code_testing
+
     idempotent!
 
     def perform(pipeline_id)

app/workers/ci/pipeline_artifacts/coverage_report_worker.rb

@@ -6,6 +6,8 @@ module Ci
       include ApplicationWorker
       include PipelineBackgroundQueue
 
+      feature_category :code_testing
+
       idempotent!
 
       def perform(pipeline_id)