make some private rsync, and exec_cluster arguments public (#11958)
make some private rsync, and exec_cluster arguments public (#11958)

* make some private rsync, and exec_cluster arguments public

* fix format issue

* undo make all_nodes public
pcmoritz/ray-1,ray-project/ray,richardliaw/ray,richardliaw/ray,richardliaw/ray,pcmoritz/ray-1,pcmoritz/ray-1,pcmoritz/ray-1,ray-project/ray,richardliaw/ray,ray-project/ray,richardliaw/ray,ray-project/ray,ray-project/ray,richardliaw/ray,ray-project/ray,pcmoritz/ray-1,pcmoritz/ray-1,pcmoritz/ray-1,ray-project/ray,richardliaw/ray,richardliaw/ray,pcmoritz/ray-1,ray-project/ray