move_iterator visualizer should use _Current

[fsb4000]

Fixes #4829

Test code:

#include <iterator>
#include <string>
#include <vector>

int main()
{
    std::vector<std::string> v{ "This", "_", "is", "_", "an", "_", "example" };
    auto begin = std::make_move_iterator(v.begin());
    return 0;
}

Result:

[StephanTLavavej]

I'm mirroring this to the MSVC-internal repo - please notify me if any further changes are pushed.

[StephanTLavavej]

Oops, I thanked you in the commit message itself, instead of a comment. First time I've ever made that mistake 🤪 ⛔ 🧠