Avoid running a db-sync with and then without prune-tx-out

[kderme]

If prune flag is enabled and then db-sync is stopped all future executions of db-sync should still have this flag. Otherwise, it is considered bad usage and can cause crashes and db-sync has no guard against it. The default db-sync schema can be extended to log that at some point this flag was enabled. This requires schema changes so it needs a major bump, eg 13.2.

Now that a extra_migration table exists, after #1484, uisage of this flags can be logged there and checked on db-sync initiation.