feat(medusa): migrate medusa unit tests / plugins integration tests to swc jest (#6820)

what:

- migrates medusa package to swc/jest
- migrates plugins integration tests to swc/jest
- parallelises a few of the heavy test packages
- fixes typeorm circular dependencies

**Unit Tests**

Before: 1 job => ~30 mins
After: 2 jobs => ~5 mins


<img width="260" alt="Screenshot 2024-03-25 at 15 11 49" src="https://github.com/medusajs/medusa/assets/5105988/e1df6985-5bd6-48d0-b87b-336d3c77d0cf">

**Plugins**

Before: 1 job => ~10 mins
After: 1 job => ~5 mins

<img width="254" alt="Screenshot 2024-03-25 at 15 26 03" src="https://github.com/medusajs/medusa/assets/5105988/c1cec0e2-a1c3-41d1-9372-46d114d804c6">



Co-authored-by: Adrien de Peretti <25098370+adrien2p@users.noreply.github.com>

packages/medusa-plugin-brightpearl/package.json

@@ -35,7 +35,7 @@
   },
   "scripts": {
     "prepare": "cross-env NODE_ENV=production yarn run build",
-    "test": "jest --passWithNoTests src",
+    "test": "jest --silent --bail --maxWorkers=50% --forceExit",
     "build": "babel src --out-dir . --ignore '**/__tests__','**/__mocks__'",
     "watch": "babel -w src --out-dir . --ignore '**/__tests__','**/__mocks__'"
   },