Move Tracing project setting model to Core

This commit moves the tracing project setting model from Ultimate to
Core.

app/models/project.rb

@@ -199,6 +199,7 @@ class Project < ApplicationRecord
   has_one :import_export_upload, dependent: :destroy # rubocop:disable Cop/ActiveRecordDependent
   has_many :export_jobs, class_name: 'ProjectExportJob'
   has_one :project_repository, inverse_of: :project
+  has_one :tracing_setting, class_name: 'ProjectTracingSetting'
   has_one :incident_management_setting, inverse_of: :project, class_name: 'IncidentManagement::ProjectIncidentManagementSetting'
   has_one :error_tracking_setting, inverse_of: :project, class_name: 'ErrorTracking::ProjectErrorTrackingSetting'
   has_one :metrics_setting, inverse_of: :project, class_name: 'ProjectMetricsSetting'
@@ -2523,6 +2524,10 @@ class Project < ApplicationRecord
     instance.token
   end
 
+  def tracing_external_url
+    tracing_setting&.external_url
+  end
+
   private
 
   def find_service(services, name)

ee/app/models/ee/project.rb

@@ -42,7 +42,6 @@ module EE
       has_one :github_service
       has_one :gitlab_slack_application_service
 
-      has_one :tracing_setting, class_name: 'ProjectTracingSetting'
       has_one :status_page_setting, inverse_of: :project, class_name: 'StatusPage::ProjectSetting'
       has_one :compliance_framework_setting, class_name: 'ComplianceManagement::ComplianceFramework::ProjectSettings', inverse_of: :project
       has_one :security_setting, class_name: 'ProjectSecuritySetting'
@@ -235,10 +234,6 @@ module EE
       namespace.store_security_reports_available? || public?
     end
 
-    def tracing_external_url
-      self.tracing_setting.try(:external_url)
-    end
-
     def latest_pipeline_with_security_reports(only_successful: false)
       pipeline_scope = all_pipelines.newest_first(ref: default_branch)
       pipeline_scope = pipeline_scope.success if only_successful

ee/spec/models/project_tracing_setting_spec.rb

-# frozen_string_literal: true
-
-require 'spec_helper'
-
-RSpec.describe ProjectTracingSetting do
-  describe '#external_url' do
-    let_it_be(:project) { create(:project) }
-
-    let(:tracing_setting) { project.build_tracing_setting }
-
-    it 'accepts a valid url' do
-      tracing_setting.external_url = "https://gitlab.com"
-
-      expect(tracing_setting).to be_valid
-
-      expect { tracing_setting.save! }.not_to raise_error
-    end
-
-    it 'fails with an invalid url' do
-      tracing_setting.external_url = "gitlab.com"
-      expect(tracing_setting).not_to be_valid
-    end
-
-    it 'fails with a blank string' do
-      tracing_setting.external_url = " "
-      expect(tracing_setting).not_to be_valid
-    end
-
-    it 'sanitizes the url' do
-      tracing_setting.external_url = "https://replaceme.com/'><script>alert(document.cookie)</script>"
-      expect(tracing_setting).to be_valid
-      expect(tracing_setting.external_url).to eq("https://replaceme.com/'&gt;")
-    end
-  end
-end

spec/models/project_spec.rb

@@ -72,6 +72,7 @@ RSpec.describe Project do
     it { is_expected.to have_one(:last_event).class_name('Event') }
     it { is_expected.to have_one(:forked_from_project).through(:fork_network_member) }
     it { is_expected.to have_one(:auto_devops).class_name('ProjectAutoDevops') }
+    it { is_expected.to have_one(:tracing_setting).class_name('ProjectTracingSetting') }
     it { is_expected.to have_one(:error_tracking_setting).class_name('ErrorTracking::ProjectErrorTrackingSetting') }
     it { is_expected.to have_one(:project_setting) }
     it { is_expected.to have_one(:alerting_setting).class_name('Alerting::ProjectAlertingSetting') }

spec/models/project_tracing_setting_spec.rb

+# frozen_string_literal: true
+
+require 'spec_helper'
+
+RSpec.describe ProjectTracingSetting do
+  describe '#external_url' do
+    let_it_be(:project) { create(:project) }
+
+    let(:tracing_setting) { project.build_tracing_setting }
+
+    describe 'Validations' do
+      describe 'external_url' do
+        it 'accepts a valid url' do
+          tracing_setting.external_url = 'https://gitlab.com'
+
+          expect(tracing_setting).to be_valid
+        end
+
+        it 'fails with an invalid url' do
+          tracing_setting.external_url = 'gitlab.com'
+
+          expect(tracing_setting).to be_invalid
+        end
+
+        it 'fails with a blank string' do
+          tracing_setting.external_url = nil
+
+          expect(tracing_setting).to be_invalid
+        end
+
+        it 'sanitizes the url' do
+          tracing_setting.external_url = %{https://replaceme.com/'><script>alert(document.cookie)</script>}
+
+          expect(tracing_setting).to be_valid
+          expect(tracing_setting.external_url).to eq(%{https://replaceme.com/'&gt;})
+        end
+      end
+    end
+  end
+end