[release/v1.12] skipping aznfs apt package installation at user's discretion

[kubermatic-bot]

This is an automated cherry-pick of #3949

/assign dharapvj

csi-azurefile addon allows customizing azure nfs apt package installation via param `INSTALL_AZNFS_MOUNT`. Default is `true`. You can turn off installation via `false`

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[kubermatic-bot]

@kubermatic-bot: The following test failed, say /retest to rerun all failed tests or /retest-required to rerun all mandatory failed tests:

Test name	Commit	Details	Required	Rerun command
pull-kubeone-verify-codegen	4754ca7	link	true	/test pull-kubeone-verify-codegen

Full PR test history

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