add sts for managing version streams

.github/chainguard/lifecycle-automation-eol.sts.yaml

@@ -0,0 +1,10 @@
+issuer: https://accounts.google.com
+
+# staging-images: not in use
+# prod-images: [email protected]
+subject: "101826719708554282120"
+
+permissions:
+  contents: write
+  workflows: write
+  pull_requests: write