Merge branch 'remove_difference_in_format_for_index' into 'master'

Remove difference in format for ELK daily indices

See merge request gitlab-org/gitlab!36469

ee/app/services/security/waf_anomaly_summary_service.rb

@@ -85,7 +85,7 @@ module Security
     # indices
     def indices
       (@from.to_date..@to.to_date).map do |day|
-        chart_above_v3? ? "filebeat-*-#{day.strftime('%Y.%m.%d')}-*" : "filebeat-*-#{day.strftime('%Y.%m.%d')}"
+        "filebeat-*-#{day.strftime('%Y.%m.%d')}"
       end
     end