Optimize SQL returned from `dolt_patch()`

Currently `dolt_patch()` is a very literal interpretation of the diff. For every row added theer is an insert statement. This optimizes for readability/parse-ability but can be slow to actually apply.

We should add an option to compress the SQL do that it is fast to actually apply. One simple thing to do would be to group many insert statements into one single statement with many values. I'm sure there are other optimizations beyond that to explore.