[SQL] Faster loading of raisinbread test data

[driusan]

This speeds up make testdata (and the GitHub Actions tests in general) faster by converting the format of loading from one INSERT statement per row to a bulk LOAD DATA LOCAL INFILE statement loading the data from a tsv.

The tsv is also more readable than the insert statements and smaller on the filesystem.

On my laptop, this took the load time from approximately 13.5 minutes to 30 seconds.

[driusan]

Added Needs Work because the API tests are not running properly even though they say they're passing and I need to investigate why.