* Fix dropTableColumns sqlite implementation
* use droptables and its index dropping support in v78 and v85
* golang-ci fixes
* Add migration from gitea 1.3.3 for sqlite which reveals the droptables bug - thus showing this works
Unfortunately the last fix didn't completely fix the migration to v79 of the db
due to bug with schema locking during Sync2. This should fix this issue.
Fix#5759
Signed-off-by: Andrew Thornton <art27@cantab.net>