Support Deferred Type Annotations in Dataset Previews

[SajidAlamQB]

Description

Related to: https://github.com/kedro-org/kedro-plugins/pull/595 and https://github.com/kedro-org/kedro-viz/issues/1622

This PR updates dataset preview types to support deferred type annotations, from __future__ import annotations.

With from __future__ import annotations, annotations are stored as strings and resolved when needed rather than immediately. This affects how annotations are accessed in Kedro-Viz particularly in how we retrieve preview_type for datasets.

Development notes

• Adjusted set_preview_type in the backend to accommodate type annotations as strings.

Checklist

• [x] 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 new entries to the RELEASE.md file
• [ ] Added tests to cover my changes

[SajidAlamQB]

Reverted FE changes as they didn't have any effect and were causing the failures.