GatewayAPI: fix LB status address exception

[izturn]

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Signed-off-by: Gang Liu [email protected]

When the user explicitly specifies an address, but the load balancer has not yet assigned this specified address to the gateway, the current logic here evaluates to false. After subsequently receiving the updated address status, the related update logic will not be triggered again (as currently only the generation is compared), so this situation is treated as true.