I attached v4.
I only disabled the two tests that already had failures on CI. After
looking into it again I realized that temp-schema-cleanup could only
fail with my hacked together linux repro, I can't reproduce it on
windows. In wait_cleanup and slot_creation_error one session kills
another session. In temp-schema-cleanup s1 kills itself. When the
fatal happens the isolation tester is reading s1's socket, and
receives the message properly, I can't make that fail without
modifying the testcase.
