Add wp_recache_rejected_cookies option (defaults: woocommerce_items_in_cart,
wp_woocommerce_session_*, wp-postpass, comment_author_*, wordpress_*) that
bypasses page cache when any listed cookie is present. Both the WP-level
check (wp_recache_should_exclude) and the standalone drop-in apply the
same exact/prefix matching logic. Editing the option regenerates the
drop-in and purges all cache.