Changing DataSet to Dataset#391

[ShubhamZoro]

Description

Changing DataSet to Dataset

[Galileo-Galilei]

Hi, thank you very much for this!

Some minor comments but we are almost good to go:

• you should rebase on because you have a lot of duplicated commits, the git history messed up a little bit
• you should merge on develop and not master because this is a breaking change. I create the branch right away
• Can you also change MlflowModelSaverDataSet -> MlflowModelSaverDataset and MlflowModelLoggerDataSet -> MlflowModelLoggerDataset? I am not sure if we will change their names or not, but in case we don't we should change them here.
• can you mention the change in the CHANGELOG.md?

[Galileo-Galilei]

Hi @ShubhamZoro, thank you very much for opening this PR, and once again sorry for not answering fast and give good support to your PR. I'll open another PR to fix the git history, unless you want to give it a try. I'll keep your commits though so you will be credited for the works. Thank you very much for contributing!

[Galileo-Galilei]

Thank you for this PR @ShubhamZoro, and sorry for not having been very supportive!