Add target_project arg to Group#to_reference

This will be the same as User#to_reference

app/models/group.rb

@@ -169,7 +169,7 @@ class Group < Namespace
     notification_settings.find { |n| n.notification_email.present? }&.notification_email
   end
 
-  def to_reference(_from = nil, full: nil)
+  def to_reference(_from = nil, target_project: nil, full: nil)
     "#{self.class.reference_prefix}#{full_path}"
   end
 

changelogs/unreleased/215326-moving-an-issue-referencing-a-group-in-a-note-can-fail.yml

+---
+title: Fix moving an issue when there is a group reference
+merge_request: 30185
+author:
+type: fixed

spec/lib/gitlab/gfm/reference_rewriter_spec.rb

@@ -147,6 +147,18 @@ describe Gitlab::Gfm::ReferenceRewriter do
       it { is_expected.to eq text }
     end
 
+    context 'when referring to a group' do
+      let(:text) { "group @#{group.full_path}" }
+
+      it { is_expected.to eq text }
+    end
+
+    context 'when referring to a user' do
+      let(:text) { "user @#{user.full_path}" }
+
+      it { is_expected.to eq text }
+    end
+
     context 'when referable has a nil reference' do
       before do
         create(:milestone, title: '9.0', project: old_project)