Consolidate vitest CI & coverage (#33808)

* Consolidate modules vitest coverage

* Use vite-common as base for modules vitest config

* Make knip happier

* Fix coverage paths

* Place modules unit tests alongside src

* Switch to defineProject for better type safety

* Consolidate vitest CI & coverage

Kills off vite-common

* Update comment

* Update lockfile

* Fix shared-components vitest config

* Soften eslint config for tests in modules

* Run eslint on modules/playwright dir too

* Make tsc happy

modules/widget-toggles/package.json

@@ -20,7 +20,6 @@
         "@types/react": "^19",
         "@vitejs/plugin-react": "catalog:",
         "@vitest/browser-playwright": "catalog:",
-        "@vitest/coverage-v8": "catalog:",
         "react": "catalog:",
         "typescript": "catalog:",
         "vite": "catalog:",