Change index VUs form 1 to 0

[Pej0815]

Brief summary

Index of first VU moved from 1 to 0.
Which leads to 2 Problems:

1. Numbers of VU is 1 larger than the one given in the executers given in the options part
2. If source of test has to be changed, if it uses variable __VU for controlling tasks or as index of arrays

k6 version

2.1.0

OS

Windows 11, Linux

Docker version and image (if applicable)

No response

Steps to reproduce the problem

use test.js with

export const options = {

scenarios: {
contacts: {
executor: 'ramping-vus',
startVUs: 1,
stages: [
{ duration: '1m', target: 9 },
{ duration: '1m', target: 9 },
],
gracefulRampDown: '30s',
},
}

and log the __VU in the default function

Expected behaviour

first __VU shall be 1 again or executers shall be fixed to new start of counting

Actual behaviour

__VU starts at 0