Add RFECV support

Reviewing [this](https://ml.dask.org/modules/api.html#module-dask_ml.model_selection) page, most of the feature selectors offered by SKLearn are covered, however it would be cool to see dask implement RFECV into that mix as well! I'd like to send a `RFECV.fit()` to a dask cluster:

```
# Perform RFECV feature selection
selector = RFECV(model,
step=0.05, # Remove 5% of features at each iteration
min_features_to_select=5, # Keep at least 5 features
cv=TimeSeriesSplit(n_splits=3),
scoring=SCORING_METRIC,
verbose=0,
n_jobs=-1,
)

# Use Dask to parallelize the feature selection
with joblib.parallel_backend('dask'):
selector.fit(X_train, y_train)
```

```
'dict' object has no attribute 'estimator'
joblib.externals.loky.process_executor._RemoteTraceback:
"""
Traceback (most recent call last):
File "C:\Users\chalu\AppData\Local\Programs\Python\Python311\Lib\site-packages\joblib\_utils.py", line 72, in __call__
return self.func(**kwargs)
^^^^^^^^^^^^^^^^^^^
File "C:\Users\chalu\AppData\Local\Programs\Python\Python311\Lib\site-packages\joblib\_dask.py", line 131, in __call__
results.append(func(*args, **kwargs))
^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\chalu\AppData\Local\Programs\Python\Python311\Lib\site-packages\sklearn\utils\parallel.py", line 139, in __call__
return self.function(*args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\chalu\AppData\Local\Programs\Python\Python311\Lib\site-packages\sklearn\feature_selection\_rfe.py", line 46, in _rfe_single_fit
X, params=routed_params.estimator.fit, indices=train
^^^^^^^^^^^^^^^^^^^^^^^
AttributeError: 'dict' object has no attribute 'estimator'
"""

The above exception was the direct cause of the following exception:

Traceback (most recent call last):
File "C:\Users\chalu\AppData\Local\Programs\Python\Python311\Lib\site-packages\pygad\pygad.py", line 1688, in cal_pop_fitness
fitness = self.fitness_func(self, sol, sol_idx)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "I:\nasty\Python_Projects\Stock_Options_Trading\DailyStockClassifierAndRegressors2025\1_1_class_train_v2_Matts.py", line 337, in fitness_func
selector.fit(X_train, y_train)
File "C:\Users\chalu\AppData\Local\Programs\Python\Python311\Lib\site-packages\sklearn\utils\validation.py", line 63, in inner_f
return f(*args, **kwargs)
^^^^^^^^^^^^^^^^^^
File "C:\Users\chalu\AppData\Local\Programs\Python\Python311\Lib\site-packages\sklearn\base.py", line 1389, in wrapper
return fit_method(estimator, *args, **kwargs)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
scores_features = parallel(
^^^^^^^^^
File "C:\Users\chalu\AppData\Local\Programs\Python\Python311\Lib\site-packages\sklearn\utils\parallel.py", line 77, in __call__
return super().__call__(iterable_with_config)
^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\chalu\AppData\Local\Programs\Python\Python311\Lib\site-packages\joblib\parallel.py", line 2007, in __call__
return output if self.return_generator else list(output)
^^^^^^^^^^^^
File "C:\Users\chalu\AppData\Local\Programs\Python\Python311\Lib\site-packages\joblib\parallel.py", line 1650, in _get_outputs
yield from self._retrieve()
File "C:\Users\chalu\AppData\Local\Programs\Python\Python311\Lib\site-packages\joblib\parallel.py", line 1754, in _retrieve
self._raise_error_fast()
File "C:\Users\chalu\AppData\Local\Programs\Python\Python311\Lib\site-packages\joblib\parallel.py", line 1789, in _raise_error_fast
error_job.get_result(self.timeout)
File "C:\Users\chalu\AppData\Local\Programs\Python\Python311\Lib\site-packages\joblib\parallel.py", line 745, in get_result
return self._return_or_raise()
^^^^^^^^^^^^^^^^^^^^^^^
File "C:\Users\chalu\AppData\Local\Programs\Python\Python311\Lib\site-packages\joblib\parallel.py", line 763, in _return_or_raise
raise self._result
AttributeError: 'dict' object has no attribute 'estimator'
```