Numpy Array Error when Training MultioutputClassifer with LogisticRegressionCV with classes underrepresented

### Describe the bug

When I train the MultioutputClassifer with LogisticRegressionCV with classes underrepresented, I get the following numpy error.
I think this is connected to the issue #28178 and #26401.

### Steps/Code to Reproduce

```python
import sklearn
print(sklearn.__version__)
from sklearn.linear_model import LogisticRegressionCV
from sklearn.multioutput import MultiOutputClassifier
import numpy as np


n, m = 20, 5
model = MultiOutputClassifier(LogisticRegressionCV())
X = np.random.randn(n, m)
y = np.concatenate([[np.random.randint(0, 2, n),
                     np.random.randint(0, 5, n)]], axis=0).T
y[-3:, 0] = [3, 4, 5]
model.fit(X, y)
```

### Expected Results

1.6.1

### Actual Results

1.6.1

```pytb
.venv/lib/python3.12/site-packages/sklearn/model_selection/_split.py:805: UserWarning: The least populated class in y has only 1 members, which is less than n_splits=5.
  warnings.warn(
Traceback (most recent call last):
  File "error_skitlearn.py", line 14, in <module>
    model.fit(X, y)
  File ".venv/lib/python3.12/site-packages/sklearn/multioutput.py", line 543, in fit
    super().fit(X, Y, sample_weight=sample_weight, **fit_params)
  File ".venv/lib/python3.12/site-packages/sklearn/base.py", line 1389, in wrapper
    return fit_method(estimator, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".venv/lib/python3.12/site-packages/sklearn/multioutput.py", line 274, in fit
    self.estimators_ = Parallel(n_jobs=self.n_jobs)(
                       ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".venv/lib/python3.12/site-packages/sklearn/utils/parallel.py", line 77, in __call__
    return super().__call__(iterable_with_config)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".venv/lib/python3.12/site-packages/joblib/parallel.py", line 1918, in __call__
    return output if self.return_generator else list(output)
                                                ^^^^^^^^^^^^
  File ".venv/lib/python3.12/site-packages/joblib/parallel.py", line 1847, in _get_sequential_output
    res = func(*args, **kwargs)
          ^^^^^^^^^^^^^^^^^^^^^
  File ".venv/lib/python3.12/site-packages/sklearn/utils/parallel.py", line 139, in __call__
    return self.function(*args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".venv/lib/python3.12/site-packages/sklearn/multioutput.py", line 63, in _fit_estimator
    estimator.fit(X, y, **fit_params)
  File ".venv/lib/python3.12/site-packages/sklearn/base.py", line 1389, in wrapper
    return fit_method(estimator, *args, **kwargs)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".venv/lib/python3.12/site-packages/sklearn/linear_model/_logistic.py", line 2038, in fit
    coefs_paths = np.reshape(
                  ^^^^^^^^^^^
  File ".venv/lib/python3.12/site-packages/numpy/_core/fromnumeric.py", line 324, in reshape
    return _wrapfunc(a, 'reshape', shape, order=order)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".venv/lib/python3.12/site-packages/numpy/_core/fromnumeric.py", line 54, in _wrapfunc
    return _wrapit(obj, method, *args, **kwds)
           ^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
  File ".venv/lib/python3.12/site-packages/numpy/_core/fromnumeric.py", line 42, in _wrapit
    conv = _array_converter(obj)
           ^^^^^^^^^^^^^^^^^^^^^
ValueError: setting an array element with a sequence. The requested array has an inhomogeneous shape after 2 dimensions. The detected shape was (5, 10) + inhomogeneous part.
```

### Versions

```shell
System:
    python: 3.12.3 (main, Jan 17 2025, 18:03:48) [GCC 13.3.0]
executable: .venv/bin/python
   machine: Linux-6.8.0-52-generic-x86_64-with-glibc2.39

Python dependencies:
      sklearn: 1.6.1
          pip: 25.0.1
   setuptools: 75.8.0
        numpy: 2.2.3
        scipy: 1.15.1
       Cython: None
       pandas: 2.2.3
   matplotlib: 3.10.0
       joblib: 1.4.2
threadpoolctl: 3.5.0

Built with OpenMP: True

threadpoolctl info:
       user_api: blas
   internal_api: openblas
    num_threads: 8
         prefix: libscipy_openblas
       filepath: .venv/lib/python3.12/site-packages/numpy.libs/libscipy_openblas64_-6bb31eeb.so
        version: 0.3.28
threading_layer: pthreads
   architecture: Haswell

       user_api: blas
   internal_api: openblas
    num_threads: 8
         prefix: libscipy_openblas
       filepath: .venv/lib/python3.12/site-packages/scipy.libs/libscipy_openblas-68440149.so
        version: 0.3.28
threading_layer: pthreads
   architecture: Haswell

       user_api: openmp
   internal_api: openmp
    num_threads: 8
         prefix: libgomp
       filepath: .venv/lib/python3.12/site-packages/scikit_learn.libs/libgomp-a34b3233.so.1.0.0
        version: None
```

COMMENT:
In my opinion, if one class is underrepresented, we can assume that its probability is close to zeros. In consequence, we can complete the coefficients with some zeros.

Labels: Bug, Needs Investigation