Change snapshot controller image version to 6.2.1 in release-6.2 branch

[Jainbrt]

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/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:

Which issue(s) this PR fixes:

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Does this PR introduce a user-facing change?:

Cherrypick #809: Change snapshot controller image version to 6.2.1

[k8s-ci-robot]

Hi @Jainbrt. Thanks for your PR.

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[xing-yang]

/ok-to-test

[xing-yang]

/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: Jainbrt, xing-yang

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