feat(pricing): pricing models are made soft deletable (#6732)

what:

- pricing models are made soft deletable
- adds missing timestamp attributes
- removes unwanted relationships + cascade cleanup

integration-tests/modules/helpers/create-variant-price-set.ts

@@ -45,6 +45,6 @@ export const createVariantPriceSet = async ({
   })
 
   return await pricingModuleService.retrieve(priceSet.id, {
-    relations: ["money_amounts"],
+    relations: ["price_set_money_amounts.money_amount"],
   })
 }