XTDB v2 is broken right now

Once it is fixed, re-enable XTDB testing in CI. <!-- This issue will be created in repo seancorfield/next-jdbc (https://github.com/seancorfield/next-jdbc). Changing this line has no effect. --> Assignees: seancorfield Labels: bug Milestone: Projects: **Describe the bug** XTDB v2 fails on multiple test runs. **To Reproduce** Run the multi-version test suite. **Expected behavior** Tests should pass. <!-- Edit the body of your new issue then click the ✓ "Create Issue" button in the top right of the editor. The first line will be the issue title. Assignees and Labels follow after a blank line. Leave an empty line before beginning the body of the issue. -->