[jobs] Support ray client format of connection string address for external module (#22116)

Ray client currently supports connection strings for external modules of the format `"other_module://"`, however `ray job` commands don't support this format because trailing `/` is removed. Update so `ray job` commands also support this format.

dashboard/modules/job/sdk.py

@@ -98,7 +98,7 @@ def parse_cluster_info(
     metadata: Optional[Dict[str, Any]] = None,
     headers: Optional[Dict[str, Any]] = None,
 ) -> ClusterInfo:
-    module_string, inner_address = _split_address(address.rstrip("/"))
+    module_string, inner_address = _split_address(address)
 
     # If user passes http(s):// or ray://, go through normal parsing.
     if module_string in {"http", "https", "ray"}:

python/ray/tests/test_client_builder.py

@@ -21,6 +21,7 @@ from ray._private.test_utils import (
         "localhost:1234",
         "localhost:1234/url?params",
         "1.2.3.4/cluster-1?test_param=param1?",
+        "",
     ],
 )
 def test_split_address(address):