message: fuzz: Actually use const addrman
diff: @@ -114,11 +114,11 @@ FUZZ_TARGET_INIT(addrman, initialize_addrman)
  });
  }
  const CAddrMan& const_addr_man{addr_man};
  - (void)/*const_*/addr_man.GetAddr(
  + (void)const_addr_man.GetAddr(
  /* max_addresses */ fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 4096),
  /* max_pct */ fuzzed_data_provider.ConsumeIntegralInRange<size_t>(0, 4096),
  /* network */ std::nullopt);
  - (void)/*const_*/addr_man.Select(fuzzed_data_provider.ConsumeBool());
  + (void)const_addr_man.Select(fuzzed_data_provider.ConsumeBool());
  (void)const_addr_man.size();
  CDataStream data_stream(SER_NETWORK, PROTOCOL_VERSION);
  data_stream << const_addr_man;
  