iTesco - missing discounts during scrape, saving originalPrice for not-discounted products, products missing in data

[MartinaGelnerova]

1. iTesco introduced discounts that are not limited to clubCard (=> not membership discounts) => we need to save these during scrape
   example - discounts are listed here: https://nakup.itesco.cz/groceries/cs-CZ/promotions
   
   originalPrice is stated in text as "předtím xy Kč"

2. There are products that are not discounted, but I keep getting their originalPrice in data
   examples:
   https://nakup.itesco.cz/groceries/cs-CZ/products/2001000141210
   https://nakup.itesco.cz/groceries/cs-CZ/products/2001012692762
   https://nakup.itesco.cz/groceries/cs-CZ/products/2001012691659
   https://nakup.itesco.cz/groceries/cs-CZ/products/2001013982497
   https://nakup.itesco.cz/groceries/cs-CZ/products/2001013982480
   https://nakup.itesco.cz/groceries/cs-CZ/products/2001012693547
   https://nakup.itesco.cz/groceries/cs-CZ/products/2001012781145

3. I miss this product in data completely, please check the crawling
   https://itesco.cz/akcni-nabidky/akcni-nabidky-produkty/produkt/trvanlive-potraviny/ryze-lusteniny-a-testoviny/adriana-testoviny/