Un-deprecate timeout arg in pipelines (#34382)

* Un-deprecate timeout

* Put "timeout" on the allowed list

* make fixup

tests/test_pipeline_mixin.py

@@ -916,6 +916,8 @@ def parse_args_from_docstring_by_indentation(docstring):
 
 
 def compare_pipeline_args_to_hub_spec(pipeline_class, hub_spec):
+    ALLOWED_TRANSFORMERS_ONLY_ARGS = ["timeout"]
+
     docstring = inspect.getdoc(pipeline_class.__call__).strip()
     docstring_args = set(parse_args_from_docstring_by_indentation(docstring))
     hub_args = set(get_arg_names_from_hub_spec(hub_spec))
@@ -933,6 +935,11 @@ def compare_pipeline_args_to_hub_spec(pipeline_class, hub_spec):
         hub_args.remove(js_generate_args[0])
         docstring_args.remove(docstring_generate_args[0])
 
+    # Special casing 2: We permit some transformers-only arguments that don't affect pipeline output
+    for arg in ALLOWED_TRANSFORMERS_ONLY_ARGS:
+        if arg in docstring_args and arg not in hub_args:
+            docstring_args.remove(arg)
+
     if hub_args != docstring_args:
         error = [f"{pipeline_class.__name__} differs from JS spec {hub_spec.__name__}"]
         matching_args = hub_args & docstring_args