Merge branch 'fix-housekeeper-overdue-finalize' into 'master'

Fix gitlab-housekeeper default reviewers to fix finalize BG migration

See merge request https://gitlab.com/gitlab-org/gitlab/-/merge_requests/143864



Merged-by: Tiger Watson <twatson@gitlab.com>
Approved-by: Tiger Watson <twatson@gitlab.com>
Co-authored-by: Dylan Griffith <dyl.griffith@gmail.com>

gems/gitlab-housekeeper/lib/gitlab/housekeeper/change.rb

@@ -10,6 +10,11 @@ class Change
         :labels,
         :reviewers
 
+      def initialize
+        @labels = []
+        @reviewers = []
+      end
+
       def mr_description
         <<~MARKDOWN
         #{description}

gems/gitlab-housekeeper/spec/gitlab/housekeeper/change_spec.rb

@@ -10,6 +10,15 @@
     change.description = 'The description'
   end
 
+  describe '#initialize' do
+    it 'sets default values for optional fields' do
+      change = described_class.new
+
+      expect(change.labels).to eq([])
+      expect(change.reviewers).to eq([])
+    end
+  end
+
   describe '#mr_description' do
     it 'includes standard content' do
       expect(change.mr_description).to eq(