fix: seed method upload or insert

[brabster]

Description

resolve #279

Resolve issue #279, so that users can revert to pre-1.4.2 behaviour and avoid need for extra IAM permissions

Models used to test - Optional

Tests are in the change - I was unable to find a quick way of verifying that the insert vs. upload method had been used but I checked debug lots (a log message indicates which strategy) and query logs to confirm that the correct number of rows were queryable

Checklist

• [/] You followed contributing section
• [/] You kept your Pull Request small and focused on a single feature or bug fix.
• [/] You added unit testing when necessary
• [/] You added functional testing when necessary

[brabster]

Confirmed can toggle between the two behaviours by setting the seed_by_insert flag in the appropriate connection profile in the project where I was having the problem upgrading, this will let us update past 1.4.2 ✔️