Adapt the R DB api to match the Python DB api on branch test_eq_tasks

[jozik]

The R code appears to all be here: https://github.com/emews/EQ-SQL/tree/main/EQ.SQL/R Tests to make work are:

• https://github.com/emews/EQ-SQL/blob/main/test/test-R-1.sh
• https://github.com/emews/EQ-SQL/blob/main/test/test-sql.R
• https://github.com/emews/EQ-SQL/blob/main/test/test-swift-R-2.sh
• test-swift-3.sh

test-swift-4.sh and test-swift-4-me.R are likely junk/attic candidates

[ncollier]

Completed in a0e00fd

Updated tests to match the python ones and moved the rest to the attic.