Remove trial suffix from plan titles that include it

This prevents trial from occuring twice in a row on the billing page

Changelog: fixed
EE: true

ee/app/views/shared/billings/_trial_status.html.haml

@@ -4,7 +4,7 @@
 - if show_start_free_trial_messages?(namespace)
   = html_escape(s_("BillingPlans|Learn more about each plan by reading our %{faq_link}, or start a free 30-day trial of GitLab.com Ultimate.")) % { faq_link: faq_link.html_safe }
 - elsif namespace.trial_active?
-  = html_escape(s_("BillingPlans|Your GitLab.com %{plan} trial will %{strong_open}expire after %{expiration_date}%{strong_close}. You can retain access to the %{plan} features by upgrading below.")) % { plan: namespace.gitlab_subscription&.plan_title, expiration_date: namespace.trial_ends_on, strong_open: '<strong>'.html_safe, strong_close: '</strong>'.html_safe }
+  = html_escape(s_("BillingPlans|Your GitLab.com %{plan} trial will %{strong_open}expire after %{expiration_date}%{strong_close}. You can retain access to the %{plan} features by upgrading below.")) % { plan: namespace.gitlab_subscription&.plan_title&.remove(' Trial'), expiration_date: namespace.trial_ends_on, strong_open: '<strong>'.html_safe, strong_close: '</strong>'.html_safe }
 - elsif namespace.trial_expired? && namespace.free_plan?
   = s_("BillingPlans|Your GitLab.com trial expired on %{expiration_date}. You can restore access to the features at any time by upgrading below.") % { expiration_date: namespace.trial_ends_on }
 - else

ee/spec/views/shared/billings/_trial_status.html.haml_spec.rb

@@ -45,6 +45,26 @@ RSpec.describe 'shared/billings/_trial_status.html.haml' do
         expect(rendered).to have_content("Your GitLab.com Premium trial will expire after #{trial_ends_on}. You can retain access to the Premium features by upgrading below.")
       end
     end
+
+    context 'with an ultimate trial using the new trial plan' do
+      let(:plan) { create(:ultimate_trial_plan) }
+
+      it 'displays expiry date and Ultimate' do
+        render 'shared/billings/trial_status', namespace: group
+
+        expect(rendered).to have_content("Your GitLab.com Ultimate trial will expire after #{trial_ends_on}. You can retain access to the Ultimate features by upgrading below.")
+      end
+    end
+
+    context 'with a premium trial using the new trial plan' do
+      let(:plan) { create(:premium_trial_plan) }
+
+      it 'displays expiry date and Premium' do
+        render 'shared/billings/trial_status', namespace: group
+
+        expect(rendered).to have_content("Your GitLab.com Premium trial will expire after #{trial_ends_on}. You can retain access to the Premium features by upgrading below.")
+      end
+    end
   end
 
   context 'when trial expired' do