Resolve constant redefinition warning for ReassuranceOrgs Struct

https://gitlab.com/gitlab-org/gitlab/-/merge_requests/67382#note_659623967

ee/app/helpers/trial_registrations/reassurances_helper.rb

@@ -5,7 +5,14 @@ module TrialRegistrations
     LOGO_IMAGE_PATH = "marketing/logos/logo_%<filename>s.svg"
     DEFAULT_OPACITY_CSS_CLASS_LEVEL = 5
 
-    Struct.new('ReassuranceOrg', :name, :opacity_level, keyword_init: true) do
+    class ReassuranceOrg
+      attr_reader :name
+
+      def initialize(name:, opacity_level: DEFAULT_OPACITY_CSS_CLASS_LEVEL)
+        @name = name
+        @opacity_level = opacity_level
+      end
+
       def image_alt_text
         s_('InProductMarketing|%{organization_name} logo') % { organization_name: name }
       end
@@ -15,21 +22,17 @@ module TrialRegistrations
       end
 
       def opacity_css_class
-        "gl-opacity-#{opacity_level}"
-      end
-
-      def opacity_level
-        self[:opacity_level] || DEFAULT_OPACITY_CSS_CLASS_LEVEL
+        "gl-opacity-#{@opacity_level}"
       end
     end
 
     def reassurance_orgs
       [
-        Struct::ReassuranceOrg.new(name: 'Siemens', opacity_level: 6),
-        Struct::ReassuranceOrg.new(name: 'Chorus'),
-        Struct::ReassuranceOrg.new(name: 'KnowBe4', opacity_level: 7),
-        Struct::ReassuranceOrg.new(name: 'Wish'),
-        Struct::ReassuranceOrg.new(name: 'Hotjar')
+        ReassuranceOrg.new(name: 'Siemens', opacity_level: 6),
+        ReassuranceOrg.new(name: 'Chorus'),
+        ReassuranceOrg.new(name: 'KnowBe4', opacity_level: 7),
+        ReassuranceOrg.new(name: 'Wish'),
+        ReassuranceOrg.new(name: 'Hotjar')
       ]
     end
   end

ee/spec/helpers/trial_registrations/reassurances_helper_spec.rb

@@ -8,41 +8,34 @@ RSpec.describe TrialRegistrations::ReassurancesHelper do
 
     it 'returns an array of ReassuranceOrg objects' do
       expect(reassurance_orgs).to be_an(Array)
-      expect(reassurance_orgs).to all(be_an_instance_of(Struct::ReassuranceOrg))
+      expect(reassurance_orgs).to all(be_an_instance_of(described_class::ReassuranceOrg))
     end
   end
 
-  describe 'Struct::ReassuranceOrg' do
+  describe 'ReassuranceOrg' do
     using RSpec::Parameterized::TableSyntax
 
-    let(:given_opacity_level) { nil }
+    let(:org_name) { 'Foo Bar Baz' }
 
-    subject(:org) { Struct::ReassuranceOrg.new(name: 'Foo Bar Baz', opacity_level: given_opacity_level) }
+    subject(:org) { described_class::ReassuranceOrg.new(name: org_name) }
 
     describe '#name' do
       it "returns the organization's name" do
-        expect(org.name).to eq('Foo Bar Baz')
+        expect(org.name).to eq(org_name)
       end
     end
 
-    describe '#opacity_level' do
-      where(:given_opacity_level, :expected_opacity_level) do
-        nil | 5
-        5   | 5
-        6   | 6
-        7   | 7
-      end
-
-      with_them do
-        it 'returns the given value or the default value' do
-          expect(org.opacity_level).to eq(expected_opacity_level)
-        end
+    describe '#opacity_css_class' do
+      context 'when no opacity_level is given' do
+        it 'returns a gitlab-ui utility CSS class for the default opacity level' do
+          expect(org.opacity_css_class).to eq('gl-opacity-5')
         end
       end
 
-    describe '#opacity_css_class' do
+      context 'when an opacity_level is given' do
+        subject(:org) { described_class::ReassuranceOrg.new(name: org_name, opacity_level: given_opacity_level) }
+
         where(:given_opacity_level, :expected_opacity_css_class) do
-        nil | 'gl-opacity-5'
           5   | 'gl-opacity-5'
           6   | 'gl-opacity-6'
           7   | 'gl-opacity-7'
@@ -54,6 +47,7 @@ RSpec.describe TrialRegistrations::ReassurancesHelper do
           end
         end
       end
+    end
 
     describe '#image_alt_text' do
       it "returns alt text for the organization's logo image" do