Replace deprecated methods for working with products

Some Bitrix24 REST API methods for working with products that are used in the module are marked as outdated (https://apidocs.bitrix24.com/api-reference/crm/outdated/products/index.html) and its development is halted. We should use more relevant alternatives from here - https://apidocs.bitrix24.com/api-reference/catalog/product/index.html#al...