Add iterations/job specifics to metadata posted to elasticsearch

[paigerube14]

It would be nice to be able to add iterations or the file used for ingress-perf to not have to search through other indexes to find this data when comparing results

Should be added as part of the json file here: https://github.com/cloud-bulldozer/e2e-benchmarking/blob/715f12affc5bd9b68c74151fce0a41b2ee0ddf43/utils/index.sh#L59

[paigerube14]

This should be PODS_PER_NODE for node-density/heavy as well