Edit translations for all jump wikis on central wiki

Fortunately jump wikis don't have questions or options, so we only have
to worry about mapping the election's ID (which we do in the same way we
do elsewhere, by title lookup).

Bug: T74576
Change-Id: Ifcf2ac4b0f9544a3968df52c2f653f15ee2f6426
Avoid holding many open DB connections

It has been decided that the small risk of inconsistent data due to
individual jump-wiki updates failing is worth avoiding breaking the DBs
by opening hundreds of connections.

Bug: T78013
Change-Id: Ib24609134dfa81bd26706e620badea4ae7baea0c
Merge "Avoid holding many open DB connections"