ci/cd: add software to CI to run cluster api with a minikube bootstrap cluster

[sflxn]

To test clusterctl with a bootstrap cluster using minikube, we need some software installed on some machines in CI. Specifically,

1. Vmware workstation
2. minikube with the Vmware support built in (Add new VMware unified driver to supported list kubernetes/minikube#2606)
3. the docker-machine driver for vmware (https://github.com/machine-drivers/docker-machine-driver-vmware/releases)

It doesn't matter if these components are installed on some static VMs or on the CI/CD kubernetes cluster nodes as long as we can run clusterctl on the machine that these components are installed on.

Note, this requirement is contingent on the minikube bootstrap workflow remaining in clusterctl, for which there are currently no discussions on removing.

[sflxn]

We are lowering this in priority as using minikube with Fusion in CI was very problematic. It introduces another software stack that we would have to debug if bootstrapping failed.

[sflxn]

Adding this would make CI really unreliable. We'd be adding multiple software stacks that would end up making debugging failing builds very difficult.