Fix secretKeyRef key in demand-backup-eks-credentials-irsa test (#1779)

Author: jvpasinatto

e2e-tests/demand-backup-eks-credentials-irsa/compare/statefulset_some-name-rs0.yml

@@ -150,13 +150,13 @@ spec:
             - name: PBM_AGENT_MONGODB_USERNAME
               valueFrom:
                 secretKeyRef:
-                  key: MONGODB_BACKUP_USER
+                  key: MONGODB_BACKUP_USER_ESCAPED
                   name: internal-some-name-users
                   optional: false
             - name: PBM_AGENT_MONGODB_PASSWORD
               valueFrom:
                 secretKeyRef:
-                  key: MONGODB_BACKUP_PASSWORD
+                  key: MONGODB_BACKUP_PASSWORD_ESCAPED
                   name: internal-some-name-users
                   optional: false
             - name: PBM_MONGODB_REPLSET