chore: Migrate region module to use DML (#7837)

packages/modules/region/mikro-orm.config.dev.ts

@@ -1,12 +1,7 @@
+import { defineMikroOrmCliConfig } from "@medusajs/utils"
 import * as entities from "./src/models"
-import { TSMigrationGenerator } from "@medusajs/utils"
 
-module.exports = {
+export default defineMikroOrmCliConfig({
   entities: Object.values(entities),
-  schema: "public",
-  clientUrl: "postgres://postgres@localhost/medusa-region",
-  type: "postgresql",
-  migrations: {
-    generator: TSMigrationGenerator,
-  },
-}
+  databaseName: "medusa-region",
+})