disk/ListSnapshots: refactor to comply with CSI

[huww98]

What type of PR is this?

/kind cleanup

What this PR does / why we need it:

disk/ListSnapshots: refactor to comply with CSI

workaround that ECS don't support max_entries < 10

Which issue(s) this PR fixes:

Fixes all CSI-sanity cases of ListSnapshots:

• listsnapshots [controller server] [it] should return appropriate values (no optional values added)
• listsnapshots [controller server] [it] should return empty when the specified snapshot id does not exist
• listsnapshots [controller server] [it] should return snapshots that match the specified source volume id
• listsnapshots [controller server] [it] should return empty when the specified source volume id does not exist
• listsnapshots [controller server] [it] check the presence of new snapshots in the snapshot list
• listsnapshots [controller server] [it] should return next token when a limited number of entries are requested

Special notes for your reviewer:

This routine is not important to Kubernetes. But as a CSI driver, we'd better correctly implement it.

Does this PR introduce a user-facing change?

ListSnapshots for disk plugin is re-implemented to comply with CSI. (no changes for Kubernetes users)

Additional documentation e.g., KEPs (Kubernetes Enhancement Proposals), usage docs, etc.:

[k8s-ci-robot]

Hi @huww98. 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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[huww98]

/ok-to-test

[mowangdk]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: huww98, mowangdk

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