Added schema to index creation

[Hydrocharged]

In Doltgres, whenever we would create an index, we would use the empty schema as the destination (the default value for the schema name). This meant that the updated table with an index was saved into the empty schema, which is incorrect since Doltgres always has a schema. This adds the schema to index creation, along with several other locations that it should be in.

[coffeegoddd]

@Hydrocharged DOLT

comparing_percentages
100.000000 to 100.000000

version	result	total
b40bfe8	ok	5937457

version	total_tests
b40bfe8	5937457

correctness_percentage
100.0