This test is no longer relevant.
It was introduced in 8c222dca4f961ad13ec64d690134a40d09b20813 to check the switch to 1MB blocks after the BDB too-many-locks issue back in 2013. The switching code has been long since removed.
It also needs a specific data file that is hard to find. I’ve verified in #6320 that it still passes, however I think there is zero reason to keep it.
Closes #6320.