Use vitest for some EW unit tests (#33816)

* Use vitest for some EW unit tests

* Ensure library builds are done before unit tests

* Stabilise jest tests

* Move more tests over

* Make sonar happier

* Update types/node for happy-dom compat again

* Decrease max-workers to stabilise jest tests

* Split jest over 3 runners to alleviate memory woes

* Switch jest to runInBand

* Attempt to deflake jest tests

* tweak coverage

* tweak coverage

pnpm-workspace.yaml

@@ -117,7 +117,7 @@ overrides:
     caniuse-lite: 1.0.30001793
     markdown-it: 14.1.1
     matrix-widget-api: "^1.17.0"
-    "@types/node": 22.13.14
+    "@types/node": ts6.0
     config-file-ts: 0.2.8-rc1
     node-abi: 4.31.0
     "@types/pg-pool": 2.0.7
@@ -139,3 +139,4 @@ minimumReleaseAgeExclude:
     - "@matrix-org/*"
     - "@vector-im/*"
     - "@element-hq/*"
+    - "@types/node@25.9.3"