chore: Start cleaning up medusa-core-utils (#7450)

**What**
- remove medusa-core-utils
- dispatch the utils where they belongs
- update usage

**NOTE**
I have been wondering if the graceful class should go into the utils package or medusa package, I ve put it in the medusa package as it seems to be the best place I can see for now and is tight to the server as well. Also, I wanted to avoid the utils package to depends on http and net dependencies, happy to change that if you feel like it

packages/modules/auth/src/services/auth-provider.ts

@@ -4,7 +4,7 @@ import {
   AuthIdentityProviderService,
   AuthenticationResponse,
 } from "@medusajs/types"
-import { MedusaError } from "medusa-core-utils"
+import { MedusaError } from "@medusajs/utils"
 import { AuthProviderRegistrationPrefix } from "@types"
 
 type InjectedDependencies = {