Use new names as type hints for deprecated classes

[deepyaman]

NOTE: Kedro datasets are moving from kedro.extras.datasets to a separate kedro-datasets package in
kedro-plugins repository. Any changes to the dataset implementations
should be done by opening a pull request in that repository.

Description

Fix to enable kedro-org/kedro-viz#1447.

Development notes

Checklist

• Read the contributing guidelines
• Opened this PR as a 'Draft Pull Request' if it is work-in-progress
• Updated the documentation to reflect the code changes
• Added a description of this change in the RELEASE.md file
• Added tests to cover my changes

[astrojuanlu]

Good catch, LGTM 👍🏽

[astrojuanlu]

Ugh, I get these come from the previous iteration... good catch

[deepyaman]

I mean, I wrote them this way intentionally, I just didn't (couldn't?) know Mypy wouldn't like it when doing import DataSetError as DatasetError. I feel like the type hints are technically correct (they're basically the same as for the alias), but it seems Mypy requires that the hint be the alias when doing this sort of assignment. So, I personally don't feel it was due to an oversight/rush on the previous PR, but rather just something that comes up when adding additional functionality.

[astrojuanlu]

oh I understand, gotcha. thanks for the explanation

[rashidakanchwala]

hah, it took all night