build(datasets): `numpy` 2 compatibility

[merelcht]

Description

Undo https://github.com/kedro-org/kedro-plugins/pull/914

Development notes

Bump networkx to work with numpy>2 and fix tests.

Checklist

• [ ] 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 relevant RELEASE.md file
• [ ] Added tests to cover my changes
• [ ] Received approvals from at least half of the TSC (required for adding a new, non-experimental dataset)