Add support for version 2 of the go-tarantool library?

[assurrussa]

Hello, I would like to add the ability to use version 2 of the go-tarantool library for load testing github.com/tarantool/go-tarantool/v2 for those who need it.

At first I just decided to make an update, but I saw that there are problems with k6 in the form of stricter typing, the versions are not fully compatible. And here is a suggestion to create a separate branch with a name, for example: "v2".

An example of the code for receiving updates can be viewed here:
assurrussa@7d45f7c

What do you think?