Add repository housekeeping methods to wikis

app/models/wiki.rb

@@ -3,6 +3,7 @@
 class Wiki
   extend ::Gitlab::Utils::Override
   include HasRepository
+  include CanHousekeepRepository
   include Gitlab::Utils::StrongMemoize
   include GlobalID::Identification
 

ee/spec/models/group_wiki_spec.rb

@@ -119,4 +119,10 @@ RSpec.describe GroupWiki do
       expect(subject).not_to be_a(Elastic::WikiRepositoriesSearch)
     end
   end
+
+  it_behaves_like 'can housekeep repository' do
+    let_it_be(:resource) { create(:group_wiki) }
+
+    let(:resource_key) { 'group_wikis' }
+  end
 end

spec/models/project_wiki_spec.rb

@@ -42,4 +42,10 @@ RSpec.describe ProjectWiki do
       end
     end
   end
+
+  it_behaves_like 'can housekeep repository' do
+    let_it_be(:resource) { create(:project_wiki) }
+
+    let(:resource_key) { 'project_wikis' }
+  end
 end