Merge pull request #6577 from xmudrii/fix-eks-eso

eks-prow-build: fix missing annotations on ESO ServiceAccount

Author: k8s-ci-robot

Diff for: infra/aws/terraform/prow-build-cluster/resources/external-secrets/external-secrets.yaml

@@ -18,6 +18,8 @@ kind: ServiceAccount
 metadata:
   name: external-secrets
   namespace: "external-secrets"
+  annotations:
+    eks.amazonaws.com/role-arn: arn:aws:iam::468814281478:role/SECRETSMANAGER-IRSA
   labels:
     helm.sh/chart: external-secrets-0.9.13
     app.kubernetes.io/name: external-secrets