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/package.json

@@ -23,6 +23,8 @@
   "license": "MIT",
   "devDependencies": {
     "@medusajs/types": "^1.11.14",
+    "@swc/core": "^1.4.8",
+    "@swc/jest": "^0.2.36",
     "@types/express": "^4.17.17",
     "@types/ioredis": "^4.28.10",
     "@types/jsonwebtoken": "^8.5.9",
@@ -43,7 +45,7 @@
     "prepublishOnly": "cross-env NODE_ENV=production tsc --build",
     "build": "rimraf dist && tsc --build",
     "serve": "node dist/app.js",
-    "test": "jest --runInBand --bail --detectOpenHandles --forceExit"
+    "test": "jest --silent --bail --maxWorkers=50% --forceExit"
   },
   "peerDependencies": {
     "medusa-interfaces": "^1.3.7",