Update k6 to v0.32.0 and support ARM
Closes #443 (closed)
MR adds the following:
- Update k6 to v0.32.0
- Adjust k6 download URLs to match the new format for v0.32.0 onwards
- Support for ARM machines with k6 ARM builds
- Dropping support for 32 bit builds, which were deprecated by k6
Edited by Grant Young