Bump "tested up to" to WP 6.5

[enricobattocchi]

PRs in the release branches:

Tasks

Beta Give feedback

1. Sets the WordPress tested up to version to 6.5 #21237
   changelog: other +1
2. https://github.com/Yoast/wordpress-seo-premium/pull/4254

PRs in trunk + WP.org SVN:

Tasks

Beta Give feedback

1. Sets the WordPress tested up to version to 6.5 duplicate-post#363
   changelog: other +1
2. Set the WordPress tested up to version to 6.5 yoast-test-helper#226
   changelog: other +1
3. ACF analysis (No PR, direct commit to Git and SVN)
4. Custom field finder (No PR, direct commit to Git and SVN)

PRs in trunk:

Tasks

Beta Give feedback

1. https://github.com/Yoast/wpseo-woocommerce/pull/997
2. https://github.com/Yoast/wpseo-video/issues/1096
3. https://github.com/Yoast/wordpress-seo-local/issues/2526
4. https://github.com/Yoast/wpseo-news/issues/869

[enricobattocchi]

Previous issue: #20781