fix: 收敛HWLAB L2发布TaskRun

合并严格串行的计划与发布阶段，并在无构建计划时跳过build TaskRun。

Co-Authored-By: Claude Opus 4.7 <noreply@anthropic.com>

scripts/src/gitops-render/templates/plan-artifacts.sh

@@ -38,6 +38,7 @@ const entries = allServices.map((serviceId) => {
     codeChanged: service.codeChanged ?? null
   };
 });
+fs.writeFileSync("/tekton/results/build-required", entries.some((entry) => entry.buildRequired) ? "true" : "false");
 for (const entry of entries) {
   fs.writeFileSync("/tekton/results/affected-" + entry.serviceId, entry.affected ? "true" : "false");
   fs.writeFileSync("/tekton/results/build-" + entry.serviceId, entry.buildRequired ? "true" : "false");