test: merge sort with collation
test: merge sort with collation

Signed-off-by: Lakshya Singh <c1d0f63b4850308b3322f4be6a4de88e5ef26271@gmail.com>

vitessio/vitess,mahak/vitess,vitessio/vitess,mahak/vitess,mahak/vitess,mahak/vitess,vitessio/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,mahak/vitess,vitessio/vitess,vitessio/vitess,mahak/vitess,vitessio/vitess