fix(pricing,types): remove is_dynamic from model + types (#5664)

what:

Removing this until we introduce dynamic pricing. 

Co-authored-by: Shahed Nasser <27354907+shahednasser@users.noreply.github.com>

packages/pricing/src/models/price-rule.ts

@@ -39,9 +39,6 @@ export default class PriceRule {
   })
   rule_type: RuleType
 
-  @Property({ columnType: "boolean", default: false })
-  is_dynamic: boolean
-
   @Property({ columnType: "text" })
   value: string