core#20247:
> fuzz: Check for addrv1 compatibility before using addrv1 serializer
core#20289:
> fuzz: Check for addrv1 compatibility before using addrv1 serializer on CService
core#20355:
> fuzz: Check for addrv1 compatibility before using addrv1 serializer/deserializer on CSubNet
> fuzz: Assert roundtrip equality for both addrv1 and addrv2 versions of CService
This is a backport of core#20247, core#20289 and core#20355