Added rebase and export capabilities for all cluster snapshot implementations

[Duke0404]

What type of PR is this?

/kind feature

What this PR does / why we need it:

Adds the ability to export (shallow copy of uncommitted changes) and rebase (places a seperate snapshot as base for uncommitted changes) cluster snapshot and its implementations. This will be useful for performing simulations for multiple scaleups sequentially.

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

NONE

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

cc: @aleksandra-malinowska @kawych @yaroslava-serdiuk

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: Duke0404
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• cluster-autoscaler/OWNERS

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[k8s-ci-robot]

Hi @Duke0404. Thanks for your PR.

I'm waiting for a kubernetes 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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[k8s-ci-robot]

PR needs rebase.

Instructions for interacting with me using PR comments are available here. If you have questions or suggestions related to my behavior, please file an issue against the kubernetes-sigs/prow repository.