Simplify VSA stage presenter I18n approach

ee/app/presenters/analytics/cycle_analytics/stage_presenter.rb

@@ -3,37 +3,6 @@
 module Analytics
   module CycleAnalytics
     class StagePresenter < Gitlab::View::Presenter::Delegated
-      DEFAULT_STAGE_ATTRIBUTES = {
-        issue: {
-          title: -> { s_('CycleAnalyticsStage|Issue') },
-          description: -> { _('Time before an issue gets scheduled') }
-        }.freeze,
-        plan: {
-          title: -> { s_('CycleAnalyticsStage|Plan') },
-          description: -> { _('Time before an issue starts implementation') }
-        }.freeze,
-        code: {
-          title: -> { s_('CycleAnalyticsStage|Code') },
-          description: -> { _('Time until first merge request') }
-        }.freeze,
-        test: {
-          title: -> { s_('CycleAnalyticsStage|Test') },
-          description: -> { _('Total test time for all commits/merges') }
-        }.freeze,
-        review: {
-          title: -> { s_('CycleAnalyticsStage|Review') },
-          description: -> { _('Time between merge request creation and merge/close') }
-        }.freeze,
-        staging: {
-          title: -> { s_('CycleAnalyticsStage|Staging') },
-          description: -> { _('From merge request merge until deploy to production') }
-        }.freeze,
-        production: {
-          title: -> { s_('CycleAnalyticsStage|Total') },
-          description: -> { _('From issue creation until deploy to production') }
-        }.freeze
-      }.freeze
-
       def title
         extract_default_stage_attribute(:title) || name
       end
@@ -49,7 +18,40 @@ module Analytics
       private
 
       def extract_default_stage_attribute(attribute)
-        DEFAULT_STAGE_ATTRIBUTES.dig(name.to_sym, attribute.to_sym)&.call
+        default_stage_attributes.dig(name.to_sym, attribute.to_sym)
+      end
+
+      def default_stage_attributes
+        @default_stage_attributes ||= {
+          issue: {
+            title: s_('CycleAnalyticsStage|Issue'),
+            description: _('Time before an issue gets scheduled')
+          },
+          plan: {
+            title:  s_('CycleAnalyticsStage|Plan'),
+            description: _('Time before an issue starts implementation')
+          },
+          code: {
+            title: s_('CycleAnalyticsStage|Code'),
+            description: _('Time until first merge request')
+          },
+          test: {
+            title: s_('CycleAnalyticsStage|Test'),
+            description: _('Total test time for all commits/merges')
+          },
+          review: {
+            title: s_('CycleAnalyticsStage|Review'),
+            description: _('Time between merge request creation and merge/close')
+          },
+          staging: {
+            title: s_('CycleAnalyticsStage|Staging'),
+            description: _('From merge request merge until deploy to production')
+          },
+          production: {
+            title: s_('CycleAnalyticsStage|Total'),
+            description: _('From issue creation until deploy to production')
+          }
+        }.freeze
       end
     end
   end

ee/spec/features/analytics/cycle_analytics/cycle_analytics_spec.rb

@@ -964,10 +964,12 @@ RSpec.describe 'Group Value Stream Analytics', :js do
       context 'Duration chart' do
         let(:duration_chart_dropdown) { page.find('.js-dropdown-stages') }
 
-        default_stages = Analytics::CycleAnalytics::StagePresenter::DEFAULT_STAGE_ATTRIBUTES
-          .each_value
-          .map { |value| value[:title].call }
-          .freeze
+        let_it_be(:translated_default_stage_names) do
+          Gitlab::Analytics::CycleAnalytics::DefaultStages.names.map do |name|
+            stage = Analytics::CycleAnalytics::GroupStage.new(name: name)
+            Analytics::CycleAnalytics::StagePresenter.new(stage).title
+          end.freeze
+        end
 
         def duration_chart_stages
           duration_chart_dropdown.all('.dropdown-item').collect(&:text)
@@ -984,7 +986,7 @@ RSpec.describe 'Group Value Stream Analytics', :js do
         it 'has all the default stages' do
           toggle_duration_chart_dropdown
 
-          expect(duration_chart_stages).to eq(default_stages)
+          expect(duration_chart_stages).to eq(translated_default_stage_names)
         end
 
         context 'hidden stage' do