Don't use WP_Query::get_posts directly

[Mamaduka]

Description

Don't call WP_Query::get_posts directly after passing args to WP_Query to avoid duplicated queries.

Similar to #32700

How has this been tested?

All checks are passing.

Types of changes

Performance/Code Quality

Checklist:

• My code is tested.
• My code follows the WordPress code style.
• My code follows the accessibility standards.
• I've tested my changes with keyboard and screen readers.
• My code has proper inline documentation.
• I've included developer documentation if appropriate.
• I've updated all React Native files affected by any refactorings/renamings in this PR (please manually search all *.native.js files for terms that need renaming or removal).
• I've updated related schemas if appropriate.

[aristath]

Since this is for the $delete_query, I don't see any issues with using $delete_query->posts instead of $delete_query->get_posts().

This looks good to me 👍

[Mamaduka]

Thanks for the review, Ari.

There's a discussion to make the method private, but I don't think this will happen because of backward compatibility.