fix(CI): switch back to using local node's disk for /tmp

to avoid fs errors

create_job.sh

@@ -105,13 +105,6 @@ spec:
           persistentVolumeClaim:
             claimName: shared-binaries
         - name: tmp
-          ephemeral:
-            volumeClaimTemplate:
-              spec:
-                accessModes: [ "ReadWriteMany" ]
-                storageClassName: "longhorn-0"
-                resources:
-                  requests:
-                    storage: 50Gi
+          emptyDir: {}
       restartPolicy: Never
 EOT