ci: enable webkit tests in interop and webRTC

[maschad]

Title

ci: enable webkit tests in interop and webRTC

Description

We had issues in the past running these tests which lead to the discovery of inadequate support in WebkitGTK

Closes https://github.com/libp2p/js-libp2p/issues/1808

Change checklist

• [x] I have performed a self-review of my own code
• [ ] I have made corresponding changes to the documentation if necessary (this includes comments as well)
• [ ] I have added tests that prove my fix is effective or that my feature works

[maschad]

This is blocked until https://github.com/libp2p/js-libp2p/issues/2007 is resolved