[API] Fixed the action parameters in the methods to create and edit orders, closes #6845
[API] Fixed the coupons expiry_date format with POST and PUT, closes #6829
Fixed WC API Coupons params, closes #6828
API - deletes the product when fails to create, closes #6801
Fixed API products when save multiple images from the media library, closes #6792
[API] Added parent_id in products endpoint, closes #6786