fix TestListVolume failure

[andyzhangx]

Is your feature request related to a problem?/Why is this needed

when 140108d is reverted, there is TestListVolume failure related to mock interface issue.

--- FAIL: TestCommonAttachDisk (0.20s)
    --- FAIL: TestCommonAttachDisk/LUN_-1_and_error_shall_be_returned_if_there's_no_such_instance_corresponding_to_given_nodeName (0.10s)
panic: runtime error: invalid memory address or nil pointer dereference [recovered]
        panic: runtime error: invalid memory address or nil pointer dereference
[signal SIGSEGV: segmentation violation code=0x1 addr=0xa0 pc=0x26f2c37]

goroutine 50 [running]:
testing.tRunner.func1.2({0x2bce1a0, 0x545e920})
        /root/go/pkg/mod/golang.org/[email protected]/src/testing/testing.go:1632 +0x230
testing.tRunner.func1()
        /root/go/pkg/mod/golang.org/[email protected]/src/testing/testing.go:1635 +0x35e
panic({0x2bce1a0?, 0x545e920?})
        /root/go/pkg/mod/golang.org/[email protected]/src/runtime/panic.go:785 +0x132
sigs.k8s.io/cloud-provider-azure/pkg/provider.(*availabilitySet).GetDataDisks(0x10?, {0x3669b70?, 0x54c23e0?}, {0x321bd70?, 0xc0006036b0?}, 0x41700b?)
        /root/go/src/sigs.k8s.io/azuredisk-csi-driver/vendor/sigs.k8s.io/cloud-provider-azure/pkg/provider/azure_controller_standard.go:261 +0x37
sigs.k8s.io/azuredisk-csi-driver/pkg/azuredisk.(*controllerCommon).GetNodeDataDisks(0x471bfd?, {0x321bd70, 0x3}, 0x0)
        /root/go/src/sigs.k8s.io/azuredisk-csi-driver/pkg/azuredisk/azure_controller_common.go:453 +0x85
sigs.k8s.io/azuredisk-csi-driver/pkg/azuredisk.(*controllerCommon).SetDiskLun(0xc00039e1e0?, {0x321bd70, 0x3}, {0xc0002042a0, 0x59}, 0xc000386240, {0x0, 0x0, 0x3fa25e50d84a3e0d?})
        /root/go/src/sigs.k8s.io/azuredisk-csi-driver/pkg/azuredisk/azure_controller_common.go:486 +0x5c
sigs.k8s.io/azuredisk-csi-driver/pkg/azuredisk.(*controllerCommon).AttachDisk(0xc00039e1e0, {0x3669de0, 0xc0004fc780}, {0x322354a, 0x9}, {0xc000204180, 0x59}, {0x321bd70, 0x3}, {0x3221a4d, ...}, ...)
        /root/go/src/sigs.k8s.io/azuredisk-csi-driver/pkg/azuredisk/azure_controller_common.go:213 +0x10ae
sigs.k8s.io/azuredisk-csi-driver/pkg/azuredisk.TestCommonAttachDisk.func3(0xc0000c0000)
        /root/go/src/sigs.k8s.io/azuredisk-csi-driver/pkg/azuredisk/azure_controller_common_test.go:255 +0x6ed
testing.tRunner(0xc0000c0000, 0xc0002cc000)
        /root/go/pkg/mod/golang.org/[email protected]/src/testing/testing.go:1690 +0xf4
created by testing.(*T).Run in goroutine 43
        /root/go/pkg/mod/golang.org/[email protected]/src/testing/testing.go:1743 +0x390
exit status 2

Describe the solution you'd like in detail

Describe alternatives you've considered

Additional context

[andyzhangx]

can you take a look at this issue. @cvvz
/assign @cvvz