Add warning when using a module with no return value (#5771)

* Add warning when using a module with no return value

* Update output files since changing source range of the pipeline argument

* Change wording of error message to not use the term unlabeled

rust/kcl-lib/tests/poop_chute/ops.snap

@@ -209,8 +209,8 @@ description: Operations executed poop_chute.kcl
         }
       },
       "sourceRange": [
-        0,
-        0,
+        1719,
+        1757,
         0
       ]
     }