test: enable csi-proxy.exe before executing Windows unit tests

[mayankshah1607]

What happened:

Following #421 (comment), the unit test pipeline on Windows will have to be changed to run csi-proxy.exe to avoid type casting errors.

What you expected to happen:

How to reproduce it:

Run unit tests on Windows using the go test command. Though the tests pass, a lot of the tests are deliberately asserting on the type casting error to prevent failures.

Anything else we need to know?:

Environment:

• CSI Driver version:
• Kubernetes version (use kubectl version):
• OS (e.g. from /etc/os-release):
• Kernel (e.g. uname -a):
• Install tools:
• Others:

[mayankshah1607]

/assign

[andyzhangx]

csi-proxy.exe could be downloaded here: https://kubernetesartifacts.azureedge.net/csi-proxy/v0.2.0/binaries/csi-proxy.tar.gz
and it could be configured as a service or simply run as a process is ok in unit test
https://github.com/kubernetes-csi/csi-proxy/blob/master/cmd/csi-proxy/main.go#L22-L25

[fejta-bot]

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[fejta-bot]

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[andyzhangx]

it's done