fix detach disk issue on deleting vmss node

[andyzhangx]

What type of PR is this?

/kind bug

What this PR does / why we need it:

fix detach disk issue on deleting node
This PR is a proceeding fix with kubernetes/kubernetes#95177
There was error msg format change when vmss node is in deleting state, this PR tries to fix this issue to make sure detach disk return success on vmss node which is being deleting

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Release note:

fix detach disk issue on deleting vmss node

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andyzhangx

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• OWNERS [andyzhangx]

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[andyzhangx]

/retest

[coveralls]

Coverage increased (+0.002%) to 80.587% when pulling c0c5b3b on andyzhangx:detach-disk-deleting into 9869e9d on kubernetes-sigs:master.

[andyzhangx]

CI is broken:

level=error msg="Running error: buildir: analysis skipped: errors in package: [cmd/cloud-controller-manager/app/controllermanager.go:44:2: package sigs.k8s.io/cloud-provider-azure/cmd/cloud-controller-manager/app/dynamic imports github.com/fsnotify/fsnotify from implicitly required module; to add missing requirements, run:\n\tgo get github.com/fsnotify/fsnotify@v1.4.9]"
level=info msg="Memory: 1062 samples, avg is 881.1MB, max is 3032.1MB"
level=info msg="Execution took 2m41.561547399s"
make: *** [Makefile:203: test-lint] Error 3
+ EXIT_VALUE=2
+ set +o xtrace

@nilo19

[nilo19]

#775 to fix this one

[andyzhangx]

/retest

[nilo19]

/lgtm