message: fuzz: Avoid timeout in EncodeBase58
diff: @@ -168,6 +168,7 @@ const std::vector<std::string> RPC_COMMANDS_SAFE_FOR_FUZZING{
  std::string ConsumeScalarRPCArgument(FuzzedDataProvider& fuzzed_data_provider)
  {
  const size_t max_string_length = 4096;
  + const size_t max_base58_bytes_length{64};
  std::string r;
  CallOneOf(
  fuzzed_data_provider,
  @@ -221,11 +222,11 @@ std::string ConsumeScalarRPCArgument(FuzzedDataProvider& fuzzed_data_provider)
  },
  [&] {
  // base58 argument
  - r = EncodeBase58(MakeUCharSpan(fuzzed_data_provider.ConsumeRandomLengthString(max_string_length)));
  + r = EncodeBase58(MakeUCharSpan(fuzzed_data_provider.ConsumeRandomLengthString(max_base58_bytes_length)));
  },
  [&] {
  // base58 argument with checksum
  - r = EncodeBase58Check(MakeUCharSpan(fuzzed_data_provider.ConsumeRandomLengthString(max_string_length)));
  + r = EncodeBase58Check(MakeUCharSpan(fuzzed_data_provider.ConsumeRandomLengthString(max_base58_bytes_length)));
  },
  [&] {
  // hex encoded block
  