Adds package count to usage data

changelogs/unreleased/205578-add-package-count-to-usage-data.yml

+---
+title: Adds package count to usage data
+merge_request: 40039
+author:
+type: added

lib/gitlab/usage_data.rb

@@ -130,6 +130,7 @@ module Gitlab
             milestone_lists: count(List.milestone),
             milestones: count(Milestone),
             projects_with_packages: distinct_count(::Packages::Package, :project_id),
+            packages: count(::Packages::Package),
             pages_domains: count(PagesDomain),
             pool_repositories: count(PoolRepository),
             projects: count(Project),

spec/lib/gitlab/usage_data_spec.rb

@@ -417,6 +417,7 @@ RSpec.describe Gitlab::UsageData, :aggregate_failures do
       expect(count_data[:project_snippets]).to eq(4)
 
       expect(count_data[:projects_with_packages]).to eq(2)
+      expect(count_data[:packages]).to eq(3)
     end
 
     it 'gathers object store usage correctly' do