Rename creator_str and updator_str DB columns

[artur-intech]

They might be called author and editor or creator and updater instead. There is no such thing as "updator".

[vohmar]

very low priority, we can come back to this once we will start with replacing papertrail.

[maciej-szlosarczyk]

The cost of this change outweighs the benefits. We'd need to change every database table we have either through multi-stage migration or a downtime. After that, we'd also need to change values inside the JSON blobs in paper_trail history or otherwise we'd need to write history queries like this:

SELECT "log_domains".* FROM "log_domains" WHERE (object->> 'updator_str' = 'somestring' OR object ->> 'updater_str' = 'somestring')

Even when we replace paper_trail with Postgres triggers or any other solution, the history will still be stored as JSON, so the retroactive change would still be necessary.