Bug 36453: (QA follow-up) Address upgraded instances

Bug 36453: (QA follow-up) Address upgraded instances

To test:
1) Apply only this patch, skipping the next one (patch 'Use varchar instead of mediumtext')
2) Run ktd up with default DBMS mariadb:10.5: ktd up
3) Confirm the database state is wrong:
  DESC categories BlockExpiredPatronOpacActions;
  ^ This should return type = mediumtext
4) Run updatedatabase, make sure green success message shows
  Running the above query again will show type = varchar(128)
5) Run updatedatabase again, notice blue info message notifies its already varchar

Signed-off-by: Katrin Fischer <katrin.fischer@bsz-bw.de>