KEP-6246: Kube-Proxy no-masquerade-cidrs option

[kairosci]

• One-line PR description: KEP proposing clearer node-to-pod source IP behaviors and kube-proxy options (no-masquerade-cidrs and node IP SNAT).
• Issue link: TBD
• Other comments: This KEP formalizes the structural solutions discussed in fix: kube-proxy SNAT with node InternalIP instead of interface address kubernetes#138360, incorporating recommendations for CNI node-to-pod source IPs, the no-masquerade-cidrs datapath optimization, and the explicit node IP SNAT fallback.

[kubernetes-prow]

Hi @kairosci. Thanks for your PR.

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[kairosci]

/cc @danwinship
/assign @danwinship

[kubernetes-prow]

[APPROVALNOTIFIER] This PR is NOT APPROVED

This pull-request has been approved by: kairosci
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