Add glm query params to issue weight trial URL

ee/app/views/shared/promotions/_promotion_link_project.html.haml

@@ -6,7 +6,7 @@
   - namespace = @project&.namespace || @group
   - if can?(current_user, :admin_namespace, namespace)
     - if trial_cta
-      = link_to s_('Promotions|Try it for free'), new_trial_registration_path, class: 'btn btn-primary issue-weights-trial-cta', target: target_blank ? '_blank' : '_self'
+      = link_to s_('Promotions|Try it for free'), new_trial_registration_path(glm_source: 'gitlab.com', glm_content: 'discover-issue-weights'), class: 'btn btn-primary issue-weights-trial-cta', target: target_blank ? '_blank' : '_self'
     - else
       - current_group = @project&.group || @group
       = link_to s_('Promotions|Upgrade your plan'), upgrade_plan_path(current_group), class: 'btn btn-primary issue-weights-upgrade-cta', target: target_blank ? '_blank' : '_self'

ee/spec/features/promotion_spec.rb

@@ -372,7 +372,7 @@ RSpec.describe 'Promotions', :js do
 
           find('.btn-link.js-toggle-button.js-weight-sidebar-callout').click
 
-          expect(find('.issue-weights-trial-cta')).to have_content 'Try it for free'
+          expect(page).to have_link 'Try it for free', href: new_trial_registration_path(glm_source: 'gitlab.com', glm_content: 'discover-issue-weights'), class: 'issue-weights-trial-cta'
           expect(find('.js-close-callout.js-close-session.tr-issue-weights-not-now-cta')).to have_content 'Not now, thanks!'
         end
       end