[release-1.31] Consolidate adjacent CIDR ranges for allowed sources

[zarvd]

What type of PR is this?

/kind feature

What this PR does / why we need it:

cherry-pick #6995

Which issue(s) this PR fixes:

Fixes #

Special notes for your reviewer:

Does this PR introduce a user-facing change?

Consolidate adjacent CIDR ranges for allowed sources

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

[k8s-ci-robot]

Hi @zarvd. 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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[MartinForReal]

/ok-to-test
/lgtm
/approve

[k8s-ci-robot]

[APPROVALNOTIFIER] This PR is APPROVED

This pull-request has been approved by: MartinForReal, zarvd

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[coveralls]

coverage: 77.266% (+0.02%) from 77.25%
when pulling 8d2ba91 on zarvd:feat/nsg/collapse-cidrs-1.31
into 91532ec on kubernetes-sigs:release-1.31.

[zarvd]

/retest

[zarvd]

/retest

[MartinForReal]

/lgtm