fix: NodePublishVolume idempotent issue and add a test case

[chyin6]

What type of PR is this?

/kind bug

What this PR does / why we need it:

NodePublishVolume need to be idempotent. Currently NodePublishVolume will mount a volume to the same mountpoint repeatedly when it's called with the same parameters multiply time. This may happen when CO encounter some failures. Such as, when NodePublishVolume is called but timeout, CO will call it with same parameters again.

run this can repo this issue.

sudo  go test -v -timeout 30s -run ^TestNodePublishVolumeIdempotentMount$ sigs.k8s.io/blob-csi-driver/pkg/blob

This issue mainly due to IsLikelyNotMountPoint can't handle bind mount. See IsLikelyNotMountPoint doc. So, list all the mount points to confirm the mountpoint exists or not.

Which issue(s) this PR fixes:

Fixes #

Requirements:

• uses conventional commit messages
• includes documentation
• adds unit tests
• tested upgrade from previous version

Special notes for your reviewer:

Release note:

fix: NodePublishVolume idempotent issue

[k8s-ci-robot]

Hi @fuxiuyin. Thanks for your PR.

I'm waiting for a kubernetes-sigs member to verify that this patch is reasonable to test. If it is, they should reply with /ok-to-test on its own line. Until that is done, I will not automatically test new commits in this PR, but the usual testing commands by org members will still work. Regular contributors should join the org to skip this step.

Once the patch is verified, the new status will be reflected by the ok-to-test label.

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[andyzhangx]

/ok-to-test

[chyin6]

/retest

[andyzhangx]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: andyzhangx, fuxiuyin

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