Multimodal: model_provider() got an unexpected keyword argument 'config'

**Describe the bug**
Running the multimodal pretrain_mistral_clip.sh, got an error
```
[after megatron is initialized] datetime: 2026-02-18 01:03:46.491419
Failed to inspect checkpoint in ./output/mcore-llava-mistral-7b-instruct-clip336-pretraining/checkpoints: _load_base_checkpoint() missing 1 required positional argument: 'args'
[rank0]: Traceback (most recent call last):
[rank0]: File "/workspace/megatron-lm/examples/multimodal/train.py", line 384, in
[rank0]: pretrain(
[rank0]: File "/workspace/megatron-lm/megatron/training/training.py", line 945, in pretrain
[rank0]: model, optimizer, opt_param_scheduler = setup_model_and_optimizer(
[rank0]: ^^^^^^^^^^^^^^^^^^^^^^^^^^
[rank0]: File "/workspace/megatron-lm/megatron/training/training.py", line 1515, in setup_model_and_optimizer
[rank0]: model = get_model(model_provider_func, model_type, wrap_with_ddp=wrap_with_ddp)
[rank0]: ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
[rank0]: File "/workspace/megatron-lm/megatron/training/training.py", line 1288, in get_model
[rank0]: model = build_model()
[rank0]: ^^^^^^^^^^^^^
[rank0]: File "/workspace/megatron-lm/megatron/training/training.py", line 1274, in build_model
[rank0]: model = model_provider_func(
[rank0]: ^^^^^^^^^^^^^^^^^^^^
[rank0]: TypeError: model_provider() got an unexpected keyword argument 'config'
```
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**Expected behavior**

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**Additional context**

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