Exclude instance services from usage data

lib/gitlab/usage_data.rb

@@ -355,7 +355,7 @@ module Gitlab
       def services_usage
         # rubocop: disable UsageData/LargeTable:
         Service.available_services_names.each_with_object({}) do |service_name, response|
-          response["projects_#{service_name}_active".to_sym] = count(Service.active.where(template: false, type: "#{service_name}_service".camelize))
+          response["projects_#{service_name}_active".to_sym] = count(Service.active.where(template: false, instance: false, type: "#{service_name}_service".camelize))
         end.merge(jira_usage, jira_import_usage)
         # rubocop: enable UsageData/LargeTable:
       end

spec/factories/usage_data.rb

@@ -24,6 +24,7 @@ FactoryBot.define do
       create(:service, project: projects[2], type: 'SlackService', active: true)
       create(:service, project: projects[2], type: 'MattermostService', active: false)
       create(:service, :template, type: 'MattermostService', active: true)
+      create(:service, :instance, type: 'MattermostService', active: true)
       create(:service, project: projects[2], type: 'CustomIssueTrackerService', active: true)
       create(:project_error_tracking_setting, project: projects[0])
       create(:project_error_tracking_setting, project: projects[1], enabled: false)