Fix Style/OpenStructUse offenses

Changelog: other

.rubocop_todo/style/open_struct_use.yml

@@ -17,7 +17,6 @@ Style/OpenStructUse:
   - spec/factories/go_module_versions.rb
   - spec/factories/wiki_pages.rb
   - spec/features/projects/clusters_spec.rb
-  - spec/finders/template_finder_spec.rb
   - spec/graphql/mutations/branches/create_spec.rb
   - spec/graphql/mutations/clusters/agent_tokens/create_spec.rb
   - spec/graphql/mutations/clusters/agents/create_spec.rb

spec/finders/template_finder_spec.rb

@@ -153,7 +153,12 @@ RSpec.describe TemplateFinder do
 
     let(:params) { {} }
 
-    subject(:result) { described_class.new(type, project, params).template_names.values.flatten.map { |el| OpenStruct.new(el) } }
+    let(:template_name_struct) { Struct.new(:name, :id, :key, :project_id, keyword_init: true) }
+
+    subject(:result) do
+      described_class.new(type, project, params).template_names.values.flatten
+        .map { |el| template_name_struct.new(el) }
+    end
 
     where(:type, :vendored_name) do
       :dockerfiles    | 'Binary'