[WIP] [tx] Make it easy to run on a multi-node Ray cluster#955

Future-Outlier wants to merge 2 commits intoNovaSky-AI:mainNovaSky-AI/SkyRL:mainfrom

Future-Outlier:tx-multi-node-ray-clusterFuture-Outlier/SkyRL:tx-multi-node-ray-clusterCopy head branch name to clipboard