Replace owner with first_owner in finder specs

spec/finders/autocomplete/users_finder_spec.rb

@@ -3,6 +3,9 @@
 require 'spec_helper'
 
 RSpec.describe Autocomplete::UsersFinder do
+  # TODO update when multiple owners are possible in projects
+  # https://gitlab.com/gitlab-org/gitlab/-/issues/21432
+
   describe '#execute' do
     let!(:user1) { create(:user, username: 'johndoe') }
     let!(:user2) { create(:user, :blocked, username: 'notsorandom') }
@@ -25,19 +28,19 @@ RSpec.describe Autocomplete::UsersFinder do
     context 'when project passed' do
       let(:project) { create(:project) }
 
-      it { is_expected.to match_array([project.owner]) }
+      it { is_expected.to match_array([project.first_owner]) }
 
       context 'when author_id passed' do
         context 'and author is active' do
           let(:params) { { author_id: user1.id } }
 
-          it { is_expected.to match_array([project.owner, user1]) }
+          it { is_expected.to match_array([project.first_owner, user1]) }
         end
 
         context 'and author is blocked' do
           let(:params) { { author_id: user2.id } }
 
-          it { is_expected.to match_array([project.owner]) }
+          it { is_expected.to match_array([project.first_owner]) }
         end
       end
     end

spec/finders/ci/daily_build_group_report_results_finder_spec.rb

@@ -6,7 +6,7 @@ RSpec.describe Ci::DailyBuildGroupReportResultsFinder do
   describe '#execute' do
     let_it_be(:project) { create(:project, :private) }
     let(:user_without_permission) { create(:user) }
-    let_it_be(:user_with_permission) { project.owner }
+    let_it_be(:user_with_permission) { project.first_owner }
     let_it_be(:ref_path) { 'refs/heads/master' }
     let(:limit) { nil }
     let_it_be(:default_branch) { false }

spec/finders/merge_request_target_project_finder_spec.rb

@@ -65,8 +65,8 @@ RSpec.describe MergeRequestTargetProjectFinder do
 
   context 'private projects' do
     let(:base_project) { create(:project, :private, path: 'base') }
-    let(:forked_project) { fork_project(base_project, base_project.owner) }
-    let(:other_fork) { fork_project(base_project, base_project.owner) }
+    let(:forked_project) { fork_project(base_project, base_project.first_owner) }
+    let(:other_fork) { fork_project(base_project, base_project.first_owner) }
 
     context 'when the user is a member of all projects' do
       before do