TunedThresholdClassifierCV: add other metrics

### Describe the workflow you want to enable

I figured that I might use the new tuned thresholder to turn code like this into something that's a bit more like gridsearch with all the parallism benefits.

```python
from sklearn.datasets import make_classification
from sklearn.linear_model import LogisticRegression
from sklearn.metrics import accuracy_score, f1_score, precision_score, recall_score
from sklearn.model_selection import FixedThresholdClassifier, train_test_split
from tqdm import trange


X, y = make_classification(
    n_samples=10_000, weights=[0.9, 0.1], class_sep=0.8, random_state=42
)

X_train, X_test, y_train, y_test = train_test_split(
    X, y, stratify=y, random_state=42
)

classifier = LogisticRegression(random_state=0).fit(X_train, y_train)

n_steps = 200
metrics = []
for i in trange(1, n_steps):
    classifier_other_threshold = FixedThresholdClassifier(
        classifier, threshold=i/n_steps, response_method="predict_proba"
    ).fit(X_train, y_train)
    
    y_pred = classifier_other_threshold.predict(X_train)
    metrics.append({
        'threshold': i/n_steps,
        'f1': f1_score(y_train, y_pred),
        'precision': precision_score(y_train, y_pred),
        'recall': recall_score(y_train, y_pred),
        'accuracy': accuracy_score(y_train, y_pred)
    })
```

This data can give me a very pretty plot with a lot of information.

![CleanShot 2024-05-21 at 10 18 42](https://github.com/scikit-learn/scikit-learn/assets/1019791/6d983d17-bfbf-43b1-8d56-3cf469123dd6)

But I think I can't make this chart with the new tuned thresholder in the 1.5 release candidate. 

I can do this:

```python
from sklearn.model_selection import TunedThresholdClassifierCV
from sklearn.metrics import make_scorer

classifier_other_threshold = TunedThresholdClassifierCV(
    classifier,  
    scoring=make_scorer(f1_score), 
    response_method="predict_proba", 
    thresholds=200, 
    n_jobs=-1, 
    store_cv_results=True
)
classifier_other_threshold.fit(X_train, y_train)
```

And this gives me data for a pretty plot as well, but it only contains the f1 score. There is no way to add extra metrics in the current implementation.
 

![CleanShot 2024-05-21 at 10 20 49](https://github.com/scikit-learn/scikit-learn/assets/1019791/a8970386-0224-4266-a3a3-1079107def99)



### Describe your proposed solution

Maybe it makes sense to also allow a `metrics` input to the tuned cv estimator. That way, it can still collect any extra metrics that we might be interested in.

### Describe alternatives you've considered, if relevant

The aforementioned code shows the chart that I am mainly interested in. A single metric never tells me the full story and the extra metrics help prevent me overfit on a single variable. Reality tends to be more complex than what a single metric can provide, so I like to nudge extra context with some (custom) metrics. 

### Additional context

_No response_

COMMENT:
Ahhhh sorry, now I see. Yeah, ok, with a visualisation feature like that I suppose you could always do that exercise without using an automated tuner and I also see how that is a separate problem. 

Fair enough. Closing this one! Thanks for the response.

Labels: New Feature, Needs Triage