[Seq2Seq Templates] Fix check_repo.py templates file (#9277)

* add enc dec pt model to check repo

* fix indent

templates/adding_a_new_model/cookiecutter-template-{{cookiecutter.modelname}}/to_replace_{{cookiecutter.lowercase_modelname}}.py

@@ -299,3 +299,23 @@ from ..{{cookiecutter.lowercase_modelname}}.modeling_tf_{{cookiecutter.lowercase
         ({{cookiecutter.camelcase_modelname}}Config, TF{{cookiecutter.camelcase_modelname}}ForConditionalGeneration),
 {% endif -%}
 # End.
+
+# To replace in: "utils/check_repo.py" if generating PyTorch
+
+# Below: "models to ignore for model xxx mapping"
+# Replace with:
+{% if cookiecutter.is_encoder_decoder_model == "False" -%}
+{% else -%}
+    "{{cookiecutter.camelcase_modelname}}Encoder",
+    "{{cookiecutter.camelcase_modelname}}Decoder",
+{% endif -%}
+# End.
+
+# Below: "models to ignore for not tested"
+# Replace with:
+{% if cookiecutter.is_encoder_decoder_model == "False" -%}
+{% else -%}
+    "{{cookiecutter.camelcase_modelname}}Encoder",  # Building part of bigger (tested) model.
+    "{{cookiecutter.camelcase_modelname}}Decoder",  # Building part of bigger (tested) model.
+{% endif -%}
+# End.