Return ids of created vulnerabilities with SBOM scanning

Changelog: changed
EE: true

ee/lib/gitlab/vulnerability_scanning/advisory_utils.rb

@@ -55,6 +55,8 @@ def create_vulnerabilities(findings)
         else
           log_error(response.payload[:error], project_ids_with_upsert: project_ids_with_upsert)
         end
+
+        response.payload[:vulnerability_ids] || []
       end
 
       def log_success(project_ids_with_upsert:)

ee/spec/lib/gitlab/vulnerability_scanning/advisory_utils_spec.rb

@@ -152,14 +152,19 @@
 
     let(:finding_map) { create(:vs_finding_map, pipeline: pipeline) }
 
-    it 'creates new vulnerabilities' do
+    it 'creates new vulnerabilities and returns their id' do
       expect(Gitlab::AppJsonLogger).to receive(:debug)
         .with(
           message: "Successfully created vulnerabilities on advisory ingestion",
           project_ids_with_upsert: [pipeline.project.id])
         .once
 
-      expect { create_vulnerabilities }.to change { Vulnerability.count }.by(1)
+      expect do
+        created_ids = create_vulnerabilities
+        expect(created_ids).to be_an(Array)
+          .and all(be_a(Integer))
+          .and be_present
+      end.to change { Vulnerability.count }.by(1)
     end
 
     context 'when exception is raised' do
@@ -175,7 +180,10 @@
            project_ids_with_upsert: [])
          .once
 
-        expect { create_vulnerabilities }.not_to change { Vulnerability.count }
+        expect do
+          created_ids = create_vulnerabilities
+          expect(created_ids).to eq([])
+        end.not_to change { Vulnerability.count }
       end
     end
   end