minikube kubectl: The --cluster flags should be prepended

[afbjorklund]

Not appended, because it will break exec

Closes #10791

[k8s-ci-robot]

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[medyagh]

/ok-to-test

[minikube-pr-bot]

kvm2 Driver
error collecting results for kvm2 driver: timing run 0 with Minikube (PR 10793): timing cmd: [/home/performance-monitor/.minikube/minikube-binaries/10793/minikube start --driver=kvm2]: starting cmd: fork/exec /home/performance-monitor/.minikube/minikube-binaries/10793/minikube: exec format error
docker Driver
error collecting results for docker driver: timing run 0 with Minikube (PR 10793): timing cmd: [/home/performance-monitor/.minikube/minikube-binaries/10793/minikube start --driver=docker]: starting cmd: fork/exec /home/performance-monitor/.minikube/minikube-binaries/10793/minikube: exec format error