Fix refactor action dropping outputs on subworkflow connection

I thought it would be cleaner to make a distinction between the output
name and the output label when reasoning about a subworkflow step in
the context of a parent workflow
(https://github.com/galaxyproject/galaxy/pull/14473/commits/b0727be9e0b096a2dacacb767a1f4ac0fc3e6540#diff-a50bcc5c08ade11249449c4100ea8c286727df601b52a5b9588eb2a385d97da7R543),
in case we'd later want to do something with the label.

I don't think I thought about this correctly though,
and it breaks connections between steps that were made by referencing
the subworkflow's output name.

This wasn't necessary for the main goal of
https://github.com/galaxyproject/galaxy/pull/14473, so I'm partially
reverting that here.

Fixes https://github.com/galaxyproject/planemo/pull/1262#issuecomment-1223874571

test/unit/workflows/test_modules.py

@@ -244,9 +244,9 @@ def test_subworkflow_new_outputs():
     outputs = subworkflow_module.get_data_outputs()
     assert len(outputs) == 2, len(outputs)
     output1, output2 = outputs
-    assert output1["label"] == "out1"
+    assert output1["name"] == "out1"
     assert output1["extensions"] == ["input"]
-    assert output2["label"] == "4:out_file1", output2["label"]
+    assert output2["name"] == "4:out_file1", output2["name"]
 
 
 class MapOverTestCase(NamedTuple):