[ray]{feat}: 1) add multithread execution mode and global thread pool management; 2) add launch_reward_fn_sub_thread#2861

chenchaoxu7575 wants to merge 4 commits intoverl-project:mainverl-project/verl:mainfrom

chenchaoxu7575:chenchao_vllm_optimchenchaoxu7575/verl:chenchao_vllm_optimCopy head branch name to clipboard