Update vitest monorepo to v4 (major) (#27638)

Update vitest monorepo to v4

Co-authored-by: renovate[bot] <29139614+renovate[bot]@users.noreply.github.com>

Author: renovate[bot]

package.json

@@ -178,7 +178,7 @@
     "@types/tar": "6.1.13",
     "@types/ua-parser-js": "0.7.39",
     "@types/webspeechapi": "0.0.29",
-    "@vitest/coverage-v8": "3.2.4",
+    "@vitest/coverage-v8": "4.0.1",
     "babel-loader": "10.0.0",
     "babel-plugin-template-html-minifier": "4.1.0",
     "browserslist-useragent-regexp": "4.1.3",
@@ -219,7 +219,7 @@
     "typescript": "5.9.3",
     "typescript-eslint": "8.46.2",
     "vite-tsconfig-paths": "5.1.4",
-    "vitest": "3.2.4",
+    "vitest": "4.0.1",
     "webpack-stats-plugin": "1.1.3",
     "webpackbar": "7.0.0",
     "workbox-build": "patch:workbox-build@npm%3A7.1.1#~/.yarn/patches/workbox-build-npm-7.1.1-a854f3faae.patch"