Add a new parameter to `WP_Query` called `update_menu_item_cache` that when set to true, primes the caches for linked terms and posts for menu item post objects. This change moves logic
found in `wp_get_nav_menu_items` into a new function called `update_menu_item_cache`. Update the menu item REST API controller, to pass the `update_menu_item_cache` parameter to the
arguments used for the `WP_Query` run to get menu items.
Props furi3r, TimothyBlynJacobs, spacedmonkey, peterwilsoncc, mitogh.
Fixes#55620.
--This line, and those below, will be ignored--
M src/wp-includes/class-wp-query.php
M src/wp-includes/nav-menu.php
M src/wp-includes/rest-api/endpoints/class-wp-rest-menu-items-controller.php
M tests/phpunit/tests/post/nav-menu.php
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