Replace delegated predicate methods with boolean-returning methods

ee/app/models/ee/project.rb

@@ -200,7 +200,6 @@ module EE
 
       delegate :auto_rollback_enabled, :auto_rollback_enabled=, :auto_rollback_enabled?, to: :ci_cd_settings
       delegate :closest_gitlab_subscription, to: :namespace
-      delegate :jira_vulnerabilities_integration_enabled?, :configured_to_create_issues_from_vulnerabilities?, to: :jira_service, allow_nil: true
 
       delegate :requirements_access_level, :security_and_compliance_access_level, to: :project_feature, allow_nil: true
       delegate :pipeline_configuration_full_path, to: :compliance_management_framework, allow_nil: true
@@ -239,6 +238,18 @@ module EE
         ::Feature.enabled?(:jira_issue_association_on_merge_request, self) &&
           feature_available?(:jira_issue_association_enforcement)
       end
+
+      def jira_vulnerabilities_integration_enabled?
+        return false unless jira_service
+
+        jira_service.jira_vulnerabilities_integration_enabled?
+      end
+
+      def configured_to_create_issues_from_vulnerabilities?
+        return false unless jira_service
+
+        jira_service.configured_to_create_issues_from_vulnerabilities?
+      end
     end
 
     class_methods do

ee/spec/models/project_spec.rb

@@ -59,6 +59,48 @@ RSpec.describe Project do
     it { is_expected.to have_many(:incident_management_oncall_schedules).class_name('IncidentManagement::OncallSchedule') }
     it { is_expected.to have_many(:incident_management_oncall_rotations).through(:incident_management_oncall_schedules).source(:rotations) }
 
+    describe '#jira_vulnerabilities_integration_enabled?' do
+      context 'when project lacks a jira_service relation' do
+        it 'returns false' do
+          expect(project.jira_vulnerabilities_integration_enabled?).to be_falsey
+        end
+      end
+
+      context 'when project has a jira_service relation' do
+        before do
+          create(:jira_service, project: project)
+        end
+
+        it 'accesses the value from the jira_service' do
+          expect(project.jira_service)
+            .to receive(:jira_vulnerabilities_integration_enabled?)
+
+          project.jira_vulnerabilities_integration_enabled?
+        end
+      end
+    end
+
+    describe '#configured_to_create_issues_from_vulnerabilities?' do
+      context 'when project lacks a jira_service relation' do
+        it 'returns false' do
+          expect(project.configured_to_create_issues_from_vulnerabilities?).to be_falsey
+        end
+      end
+
+      context 'when project has a jira_service relation' do
+        before do
+          create(:jira_service, project: project)
+        end
+
+        it 'accesses the value from the jira_service' do
+          expect(project.jira_service)
+            .to receive(:configured_to_create_issues_from_vulnerabilities?)
+
+          project.configured_to_create_issues_from_vulnerabilities?
+        end
+      end
+    end
+
     describe '#jira_issue_association_required_to_merge_enabled?' do
       using RSpec::Parameterized::TableSyntax