Alternative to floppy kickstart for vsphere-iso provider?

[Wolfsrudel]

Uuuh, look at this one: https://github.com/jetbrains-infra/packer-builder-vsphere/issues/85#issuecomment-382053078

And this: https://github.com/jetbrains-infra/packer-builder-vsphere/issues/85#issuecomment-384968433