fix(ycsb): upload image that has python2 installed
fix(ycsb): upload image that has python2 installed

PR #5238 wrongly didn't pushed out the correct working docker image
hence it was failing to run, casue it hase missing python2 inside the
image

scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests,scylladb/scylla-cluster-tests