Added nearest neighbor transform for Itensor in VQE mode (batch)

    options.insert("vqe-execution-context", kernelDecomposed);

    visitor->setOptions(options);

    // Nearest neighbor transform:

    if (visitor->name() == "itensor-mps" || visitor->name() == "exatn-mps" ||

        visitor->name() == "exatn-pmps") {

      auto opt = xacc::getService<xacc::IRTransformation>("nnizer");

      opt->apply(kernelDecomposed.getBase(), nullptr,

                 {std::make_pair("max-distance", 1)});

    }

    // Initialize the visitor

    visitor->initialize(buffer, getShotCountOption(options));

    visitor->setKernelName(kernelDecomposed.getBase()->name());