866386 updates @wdio npm packages in core to v8. Both selenium jobs (wmf-quibble-selenium-php74-docker and mediawiki-quibble-selenium-vendor-mysql-php74-docker) in CI fail after timing out.
Tests run fine on my machine using both node v16 (P45889) and node v14 (P45888).
Looks like something changed in wdio v8. The latest v7 (v7.30.2, 901566) runs just fine in CI, the first v8 (v8.0.0, 901567) fails.
This might be connected to T313899: Fresh problem when running Selenium tests. My local container sometimes gets stuck like this.