Feat(core-flows, inventory-next, medusa, types): Add create location level endpoint (#6695)

* initialize create location levels

* add enough from pr to make code build and test

* fix integration tests

* pr feedback

* fix errors

* rm dto

* Update packages/core-flows/src/inventory/steps/validate-inventory-locations.ts

Co-authored-by: Oli Juhl <59018053+olivermrbl@users.noreply.github.com>

---------

Co-authored-by: Oli Juhl <59018053+olivermrbl@users.noreply.github.com>

packages/types/src/inventory/service-next.ts

@@ -790,6 +790,11 @@ export interface IInventoryServiceNext extends IModuleService {
     context?: Context
   ): Promise<void>
 
+  deleteInventoryLevels(
+    inventoryLevelIds: string | string[],
+    context?: Context
+  ): Promise<void>
+
   /**
    * This method is used to adjust the inventory level's stocked quantity. The inventory level is identified by the IDs of its associated inventory item and location.
    *