Merge branch 'jh-change-epics-gmau-metric' into 'master'

Change epics gmau metric to include epic actions

See merge request gitlab-org/gitlab!75410

config/metrics/counts_28d/20210216181158_epics.yml

@@ -15,7 +15,5 @@ distribution:
 tier:
 - premium
 - ultimate
-performance_indicator_type:
-- gmau
-- paid_gmau
+performance_indicator_type: []
 milestone: "<13.9"

ee/config/metrics/counts_28d/20210318183733_epics_usage_total_unique_counts_monthly.yml

@@ -49,4 +49,6 @@ distribution:
 tier:
 - premium
 - ultimate
-performance_indicator_type: []
+performance_indicator_type:
+- gmau
+- paid_gmau