Repository: huggingface/transformers
Pull request: handle training summary when creating modelcard but offline mode is set

# What does this PR do?
When using the trainer with HF_HUB_OFFLINE=1, I get this stack trace due to an unhandled edge case

```
/root/miniconda3/envs/py3.11/lib/python3.11/site-packages/transformers/trainer.py:4665: in create_model_card
    training_summary = TrainingSummary.from_trainer(
/root/miniconda3/envs/py3.11/lib/python3.11/site-packages/transformers/modelcard.py:611: in from_trainer
    return cls(
<string>:17: in __init__
    ???
/root/miniconda3/envs/py3.11/lib/python3.11/site-packages/transformers/modelcard.py:383: in __post_init__
    info = model_info(self.finetuned_from)
/root/miniconda3/envs/py3.11/lib/python3.11/site-packages/huggingface_hub/utils/_validators.py:114: in _inner_fn
    return fn(*args, **kwargs)
/root/miniconda3/envs/py3.11/lib/python3.11/site-packages/huggingface_hub/hf_api.py:2518: in model_info
    r = get_session().get(path, headers=headers, timeout=timeout, params=params)
/root/miniconda3/envs/py3.11/lib/python3.11/site-packages/requests/sessions.py:602: in get
    return self.request("GET", url, **kwargs)
/root/miniconda3/envs/py3.11/lib/python3.11/site-packages/requests/sessions.py:589: in request
    resp = self.send(prep, **send_kwargs)
/root/miniconda3/envs/py3.11/lib/python3.11/site-packages/requests/sessions.py:703: in send
    r = adapter.send(request, **kwargs)
_ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ _ 

self = <huggingface_hub.utils._http.OfflineAdapter object at 0x2a7cc82cf3d0>
request = <PreparedRequest [GET]>, args = ()
kwargs = {'cert': None, 'proxies': OrderedDict(), 'stream': False, 'timeout': None, ...}

    def send(self, request: PreparedRequest, *args, **kwargs) -> Response:
>       raise OfflineModeIsEnabled(
            f"Cannot reach {request.url}: offline mode is enabled. To disable it, please unset the `HF_HUB_OFFLINE` environment variable."
        )
E       huggingface_hub.errors.OfflineModeIsEnabled: Cannot reach https://huggingface.co/api/models/axolotl-ai-co/DeepSeek-V3-11M: offline mode is enabled. To disable it, please unset the `HF_HUB_OFFLINE` environment variable.

/root/miniconda3/envs/py3.11/lib/python3.11/site-packages/huggingface_hub/utils/_http.py:107: OfflineModeIsEnabled
```
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Fixes # (issue)


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Changed files:
filename: src/transformers/modelcard.py
patch: @@ -24,6 +24,7 @@
 import requests
 import yaml
 from huggingface_hub import model_info
+from huggingface_hub.errors import OfflineModeIsEnabled
 from huggingface_hub.utils import HFValidationError
 
 from . import __version__
@@ -385,7 +386,12 @@ def __post_init__(self):
                 for tag in info.tags:
                     if tag.startswith("license:"):
                         self.license = tag[8:]
-            except (requests.exceptions.HTTPError, requests.exceptions.ConnectionError, HFValidationError):
+            except (
+                requests.exceptions.HTTPError,
+                requests.exceptions.ConnectionError,
+                HFValidationError,
+                OfflineModeIsEnabled,
+            ):
                 pass
 
     def create_model_index(self, metric_mapping):