Enforce sort order of columns as specified in INSERT #790
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Closes #741
This ensures only those columns specified by the user in an INSERT are in the batch.
For native, this means simply sorting the columns according to the requested order - as ClickHouse returns them in table order.
For HTTP, we have to filter the columns as we use DESCRIBE in this case to get the table columns.
We cover the case where no columns are specified - we assume All which means no breaking change.