feat: shard modules and API integration tests (#6775)

what:

- runs module and api integration tests in matrix strategy
  - v28 of jest comes with sharding support, which we can utilize when we upgrade
- splits the tests by number of matrix jobs and run them in parallel
  - This introduced some flakiness in some specs, but couldn't reproduce locally. Those have been skipped for now.
- uses swc/jest for added performance
  - Locally, a chunk took 90 seconds with babel and 30 seconds with swc. 
  - This translated to 2 mins saved per shard in CI, but haven't tested this enough.

turbo.json

@@ -2,29 +2,21 @@
   "$schema": "https://turbo.build/schema.json",
   "pipeline": {
     "build": {
-      "dependsOn": [
-        "^build"
-      ],
-      "outputs": [
-        "!node_modules/**",
-        "!src/**",
-        "*/**"
-      ]
+      "dependsOn": ["^build"],
+      "outputs": ["!node_modules/**", "!src/**", "*/**"]
     },
     "test": {
-      "dependsOn": [
-        "build"
-      ],
+      "dependsOn": ["build"],
       "outputs": []
     },
     "test:integration": {
-      "dependsOn": [
-        "build"
-      ],
+      "dependsOn": ["build"],
+      "outputs": []
+    },
+    "test:integration:chunk": {
+      "dependsOn": ["build"],
       "outputs": []
     }
   },
-  "globalDependencies": [
-    "turbo.json"
-  ]
+  "globalDependencies": ["turbo.json"]
 }