Re-enable kotlin tests
Reverts https://github.com/github/codeql-action/pull/1473
Hmmm...now it's failing, but because there's an even newer version of kotlin. We are going to need to choose a specific version of kotlin based on the version of the CLI.
Converting to draft mode since I won't be able to work on this. If someone else wants to pick it up, please do so.
Not going to be able to get to this.
This should now be working properly. The version of kotlin is fixed to 1.8.21. We can consider upgrading the version in the future, or even running against multiple versions if we like.