Fix group code coverage csv

This commit fixes a bug to download the group code coverage
data as a csv.

app/finders/ci/daily_build_group_report_results_finder.rb

@@ -40,7 +40,7 @@ module Ci
         date: start_date..end_date
       }
 
-      if ref_path
+      if ref_path.present?
         params[:ref_path] = ref_path
       else
         params[:default_branch] = true

ee/app/views/groups/analytics/repository_analytics/show.html.haml

@@ -4,5 +4,5 @@
   %h3
     = _("Repositories Analytics")
 
-#js-group-repository-analytics{ data: { group_analytics_coverage_reports_path: group_analytics_coverage_reports_path(@group, format: :csv),
+#js-group-repository-analytics{ data: { group_analytics_coverage_reports_path: group_analytics_coverage_reports_path(@group, format: :csv, ref_path: ""),
   group_full_path: @group.full_path } }

ee/changelogs/unreleased/mo-fix-group-code-coverage-csv.yml

+---
+title: Fix group code coverage data csv
+merge_request: 50155
+author:
+type: fixed