backport volumegroupsnapshot commits to release-7.0

[Madhu-1]

What type of PR is this?

Uncomment only one /kind <> line, hit enter to put that in a new line, and remove leading whitespaces from that line:

/kind api-change

/kind bug

/kind cleanup /kind design /kind documentation /kind failing-test /kind feature /kind flake

What this PR does / why we need it:

This PR cherry-picks the below PRs to the release-7.0 branch which helps to support the volumegroupsnapshot feature in the next 7.x release.

https://github.com/kubernetes-csi/external-snapshotter/pull/1014 https://github.com/kubernetes-csi/external-snapshotter/pull/1015 https://github.com/kubernetes-csi/external-snapshotter/pull/1011 https://github.com/kubernetes-csi/external-snapshotter/pull/1034

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?:

None

[k8s-ci-robot]

Hi @Madhu-1. Thanks for your PR.

I'm waiting for a kubernetes-csi 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.

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[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Madhu-1 Once this PR has been reviewed and has the lgtm label, please assign xing-yang for approval. For more information see the Kubernetes Code Review Process.

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Needs approval from an approver in each of these files: - **[OWNERS](https://github.com/kubernetes-csi/external-snapshotter/blob/release-7.0/OWNERS)** Approvers can indicate their approval by writing `/approve` in a comment Approvers can cancel approval by writing `/approve cancel` in a comment

[Madhu-1]

/assign @xing-yang @nixpanic

[xing-yang]

Can you separate these backports into different PRs? It's easier to review this way. Thanks.

[Madhu-1]

@xing-yang sure i can do that, closing this one to send separate PR's