Optionally ignore OS-supplied network prefixes for multihomed addresses

In certain environments (kubernetes) cluster members may be under different subnets but they should all respond to the same "parent" subnet.
We should add a boolean property in the Hot Rod topology config (networkPrefixOverride), defaulting to true which uses the private network subnets as defined in RFC 1918 https://datatracker.ietf.org/doc/html/rfc1918

For example, the network address 10.1.2.3/23 would be interpreted as 10.1.2.3/8 instead.