update jest to v30 (#3815)

e2e:
- needed window.close(), otherwise the objects are not destroyed
- add missing `await` in clock test
- set maxListeners for all tests

remaining todo (comes with another PR if I find the problem):
- calendar e2e is now the only test which still needs `--forceExit`

package.json

@@ -97,7 +97,7 @@
 		"eslint-plugin-package-json": "^0.40.1",
 		"express-basic-auth": "^1.2.1",
 		"husky": "^9.1.7",
-		"jest": "^29.7.0",
+		"jest": "^30.0.2",
 		"jsdom": "^26.1.0",
 		"lint-staged": "^16.1.2",
 		"markdownlint-cli2": "^0.18.1",