add sts for cve detection service

.github/chainguard/lifecycle-cve-detection.sts.yaml

@@ -0,0 +1,10 @@
+issuer: https://accounts.google.com
+
+# staging-images: cve-detection-sa@staging-images-183e.iam.gserviceaccount.com (108595486951512447790)
+# prod-images: cve-detection-sa@prod-images-c6e5.iam.gserviceaccount.com (107176869706106619885)
+subject_pattern: "(108595486951512447790|107176869706106619885)"
+
+permissions:
+  pull_requests: write
+  contents: write
+  workflows: write