Enable contenthash in filename for dynamic assets (#20813) (#20932)

This should solve the main problem of dynamic assets getting stale after
a version upgrade. Everything not affected will use query-string based
cache busting, which includes files loaded via HTML or worker scripts.

jest.config.js

@@ -1,7 +1,7 @@
 export default {
   rootDir: 'web_src',
   setupFilesAfterEnv: ['jest-extended/all'],
-  testEnvironment: '@happy-dom/jest-environment',
+  testEnvironment: 'jest-environment-jsdom',
   testMatch: ['<rootDir>/**/*.test.js'],
   testTimeout: 20000,
   transform: {