Replace @dataProvider docblocks with PHPUnit 8 attributes
### Problem/Motivation
Replaces @dataProvider annotations with PHPUnit 8 #[DataProvider] attributes across 52 test files since PHPUnit 12 dropped support for docblock-based data providers.
### Work items
- Commit(s): [34b46cd483](https://github.com/palantirnet/drupal-rector/commit/34b46cd483fb)
### Credit
- Implemented by: @bbrala
---
*Filed retroactively as part of the Drupal 12 rector coverage effort. Closed as fixed; credit to be applied to the contributors listed above.*
*AI was used extensively to build this fix and to file this issue. See [Dries Buytaert: AI-generated Rector rules for Drupal](https://dri.es/ai-generated-rector-rules-for-drupal) and [Björn Brala: Drupal Rector rules are config, not code. Mostly.](https://www.linkedin.com/pulse/drupal-rector-rules-config-code-mostly-bj%C3%B6rn-brala-vfpwe/).*
issue