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

python/ray/autoscaler/sdk.py

@@ -70,6 +70,8 @@ def run_on_cluster(cluster_config: Union[dict, str],
                    *,
                    cmd: Optional[str] = None,
                    run_env: str = "auto",
+                   tmux: bool = False,
+                   stop: bool = False,
                    no_config_cache: bool = False,
                    port_forward: Optional[commands.Port_forward] = None,
                    with_output: bool = False) -> Optional[str]:
@@ -81,6 +83,8 @@ def run_on_cluster(cluster_config: Union[dict, str],
         cmd (str): the command to run, or None for a no-op command.
         run_env (str): whether to run the command on the host or in a
             container. Select between "auto", "host" and "docker".
+        tmux (bool): whether to run in a tmux session
+        stop (bool): whether to stop the cluster after command run
         no_config_cache (bool): Whether to disable the config cache and fully
             resolve all environment settings from the Cloud provider again.
         port_forward ( (int,int) or list[(int,int)]): port(s) to forward.
@@ -95,8 +99,8 @@ def run_on_cluster(cluster_config: Union[dict, str],
             cmd=cmd,
             run_env=run_env,
             screen=False,
-            tmux=False,
-            stop=False,
+            tmux=tmux,
+            stop=stop,
             start=False,
             override_cluster_name=None,
             no_config_cache=no_config_cache,
@@ -106,8 +110,8 @@ def run_on_cluster(cluster_config: Union[dict, str],
 
 def rsync(cluster_config: Union[dict, str],
           *,
-          source: str,
-          target: str,
+          source: Optional[str],
+          target: Optional[str],
           down: bool,
           ip_address: str = None,
           use_internal_ip: bool = False,