Feature: Add `MLFLOW_MAX_LOG_PARAMS` to `MLflowCallback`
Author: cecheta
Pull request: yes

# What does this PR do?

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This PR adds `MLFLOW_MAX_LOG_PARAMS` environment variable, to allow the user to limit the number of parameters logged to MLflow.

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Closes #34276 


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_Copying from #29032_

@muellerzr @pacman100 @noise-field @amyeroberts 

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Comments:
Could you just run the code quality tool to ensure that the code quality passes? You can install them with the following, from the root of your clone:
```
pip install -e ".[quality]"
```
And then run them with:
```
make fixup
```

> Could you just run the code quality tool to ensure that the code quality passes? You can install them with the following, from the root of your clone:
> 
> ```
> pip install -e ".[quality]"
> ```
> 
> And then run them with:
> 
> ```
> make fixup
> ```

@LysandreJik I've rebased my branch and run the tool, but it's still failing. However, I don't think it's related to my change

![image](https://github.com/user-attachments/assets/4a189b1d-6265-4e1e-8796-d50191a08513)


Seems good! Thanks for your changes, merging