Adds GuestPackageCounter to usage data

changelogs/unreleased/205578-adds-guest-pkg-events-to-usage-data.yml

+---
+title: Adds guest package events to usage data
+merge_request: 48734
+author:
+type: added

lib/gitlab/usage_data_counters.rb

@@ -3,6 +3,7 @@
 module Gitlab
   module UsageDataCounters
     COUNTERS = [
+      GuestPackageEventCounter,
       WikiPageCounter,
       WebIdeCounter,
       NoteCounter,

spec/lib/gitlab/usage_data_spec.rb

@@ -654,6 +654,7 @@ RSpec.describe Gitlab::UsageData, :aggregate_failures do
 
     it { is_expected.to include(:kubernetes_agent_gitops_sync) }
     it { is_expected.to include(:static_site_editor_views) }
+    it { is_expected.to include(:package_guest_i_package_composer_guest_pull) }
   end
 
   describe '.usage_data_counters' do