Cart Item / Order Item data required in woocommerce_checkout_product_title & woo commerce_order_product_title filters

Pending from #3181 
woocommerce_checkout_product_title - passing values['data'] is not enough, since it doesn't contain all cart data contained in values, which is necessary to establish parent-child relationships in the case of Composite Products.

Same with the woocommerce_order_product_title filter. See comments below.