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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[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.

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