fix(utils): Uppercase event action name (#7822)

Currently, the keys of the events contain a lowercased action, e.g. `INVENTORY_ITEM_created`, which is breaking our usage across multiple modules

packages/modules/product/integration-tests/__tests__/product-module-service/product-categories.spec.ts

@@ -1,7 +1,7 @@
 import { IProductModuleService } from "@medusajs/types"
 import {
-  Modules,
   CommonEvents,
+  Modules,
   ProductEvents,
   ProductStatus,
   composeMessage,