feat(dashboard,types,promotion,medusa): hide fields on promotions depending on templates (#7746)

**what:**

- hides different fields depending on the chosen template
- remove operator values API
- fixes to edit promotion rules
- make currency optional for promotion

RESOLVES CORE-2297

packages/modules/promotion/src/migrations/Migration20240617102917.ts

@@ -0,0 +1,22 @@
+import { Migration } from "@mikro-orm/migrations"
+
+export class Migration20240617102917 extends Migration {
+  async up(): Promise<void> {
+    this.addSql(
+      'alter table "promotion_application_method" alter column "currency_code" type text using ("currency_code"::text);'
+    )
+
+    this.addSql(
+      'alter table "promotion_application_method" alter column "currency_code" drop not null;'
+    )
+  }
+
+  async down(): Promise<void> {
+    this.addSql(
+      'alter table "promotion_application_method" alter column "currency_code" type text using ("currency_code"::text);'
+    )
+    this.addSql(
+      'alter table "promotion_application_method" alter column "currency_code" set not null;'
+    )
+  }
+}

packages/modules/promotion/src/types/application-method.ts

@@ -13,7 +13,7 @@ export interface CreateApplicationMethodDTO {
   target_type: ApplicationMethodTargetTypeValues
   allocation?: ApplicationMethodAllocationValues
   value?: BigNumberInput
-  currency_code: string
+  currency_code?: string | null
   promotion: Promotion | string | PromotionDTO
   max_quantity?: BigNumberInput | null
   buy_rules_min_quantity?: BigNumberInput | null
@@ -26,7 +26,7 @@ export interface UpdateApplicationMethodDTO {
   target_type?: ApplicationMethodTargetTypeValues
   allocation?: ApplicationMethodAllocationValues
   value?: BigNumberInput
-  currency_code?: string
+  currency_code?: string | null
   promotion?: Promotion | string | PromotionDTO
   max_quantity?: BigNumberInput | null
   buy_rules_min_quantity?: BigNumberInput | null