fix MDEV-7863, the broken type_varchar test #2

Description

Bug is said to be fixed in 7.5.7, but we still experience the exact same problem – tokudb.type_varchar leaves parts of t3 table behind:

.. so the next test in line fails:

Environment

None

Status

Assignee

Unassigned

Reporter

Elena Stepanova

Labels

External issue ID

None

Freshdesk Tickets

None

Affects versions

Priority

Major
Configure