Promote LoadBalancerIPMode to GA

Author: RyanAoh

keps/prod-readiness/sig-network/1860.yaml

@@ -6,3 +6,5 @@ alpha:
   approver: "@wojtek-t"
 beta:
   approver: "@wojtek-t" # temptative
+stable:
+  approver: "@wojtek-t"

keps/sig-network/1860-kube-proxy-IP-node-binding/kep.yaml

@@ -14,14 +14,14 @@ approvers:
   - "@thockin"
   - "@andrewsykim"
 
-stage: "beta"
+stage: "stable"
 
-latest-milestone: "v1.30"
+latest-milestone: "v1.32"
 
 milestone:
   alpha: "v1.29"
   beta: "v1.30"
-  stable: "v1.31"
+  stable: "v1.32"
 
 feature-gates:
   - name: LoadBalancerIPMode