Enable group wikis import/export

In this commit we enable the functionality of group wikis
import/export for premium users.

config/feature_flags/development/group_wiki_import_export.yml

----
-name: group_wiki_import_export
-introduced_by_url: https://gitlab.com/gitlab-org/gitlab/-/merge_requests/51873
-rollout_issue_url: 
-milestone: '13.9'
-type: development
-group: group::editor
-default_enabled: false

ee/app/helpers/ee/export_helper.rb

@@ -6,7 +6,7 @@ module EE
 
     override :group_export_descriptions
     def group_export_descriptions
-      super + [_('Epics'), _('Events')]
+      super + [_('Epics'), _('Events'), _('Group Wikis')]
     end
   end
 end

ee/app/services/ee/groups/import_export/export_service.rb

@@ -9,7 +9,6 @@ module EE
         override :savers
         def savers
           return super unless ndjson?
-          return super if ::Feature.disabled?(:group_wiki_import_export, group)
 
           super << group_and_descendants_repo_saver
         end

ee/app/services/ee/groups/import_export/import_service.rb

@@ -9,7 +9,6 @@ module EE
         override :restorers
         def restorers
           return super unless ndjson?
-          return super if ::Feature.disabled?(:group_wiki_import_export, group)
 
           super << group_and_descendants_repo_restorer
         end

ee/changelogs/unreleased/300303-fj-enable-group-wiki-import-export.yml

+---
+title: Add group wikis import/export functionality
+merge_request: 53247
+author:
+type: added

ee/spec/helpers/ee/export_helper_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe ExportHelper do
+  describe '#group_export_descriptions' do
+    it 'includes EE features in the description' do
+      expect(helper.group_export_descriptions).to include('Epics', 'Events', 'Group Wikis')
+    end
+  end
+end

ee/spec/services/ee/groups/import_export/export_service_spec.rb

@@ -47,16 +47,6 @@ RSpec.describe Groups::ImportExport::ExportService do
       expect(File.exist?(Gitlab::ImportExport.group_wiki_repo_bundle_full_path(shared, subgroup.id))).to eq true
     end
 
-    context 'when feature flag :group_wiki_import_export is disabled' do
-      it 'does not export group wiki repositories' do
-        stub_feature_flags(group_wiki_import_export: false)
-
-        expect(::Gitlab::ImportExport::Group::GroupAndDescendantsRepoSaver).not_to receive(:new)
-
-        export_service.execute
-      end
-    end
-
     context 'when ndjson is not enabled' do
       it 'does not export group wiki repositories' do
         allow(export_service).to receive(:ndjson?).and_return(false)

ee/spec/services/ee/groups/import_export/import_service_spec.rb

@@ -41,16 +41,6 @@ RSpec.describe Groups::ImportExport::ImportService do
       end
     end
 
-    context 'when feature flag :group_wiki_import_export is disabled' do
-      it 'does not export group wiki repositories' do
-        stub_feature_flags(group_wiki_import_export: false)
-
-        expect(::Gitlab::ImportExport::Group::GroupAndDescendantsRepoRestorer).not_to receive(:new)
-
-        import_service.execute
-      end
-    end
-
     context 'when export file not in ndjson format' do
       let(:import_file) { fixture_file_upload('spec/fixtures/legacy_group_export.tar.gz') }
 

locale/gitlab.pot

@@ -14044,6 +14044,9 @@ msgstr ""
 msgid "Group URL"
 msgstr ""
 
+msgid "Group Wikis"
+msgstr ""
+
 msgid "Group avatar"
 msgstr ""