[Elevate] Update analytics for promo banner

[rachelmcr]

The following analytics events should be fired for tracking the promo banner (the events already exist; they need to be fired with the corresponding custom props):

Event	Custom props	Trigger
feature_card_shown	source: product_detail, campaign_name : linked_products_promo	When the promotion is shown to the user
feature_card_dismissed	source: product_detail, campaign_name : linked_products_promo, remind_later: true/false	When the user dismisses the promotion
feature_card_cta_tapped	source: product_detail, campaign_name : linked_products_promo	When the user taps on the call to action