message: Fix BlockToJsonVerbose benchmark
  Currently it was not possible to run just the BlockToJsonVerboes benchmarsk because it did not set up everything it needed, running `bench_bitcoin -filter=BlockToJsonVerbose` caused this assert to fail:
  ```
  bench_bitcoin: chainparams.cpp:506: const CChainParams& Params(): Assertion `globalChainParams' failed.
  ```
  Initializing TestingSetup fixes this.
diff: #include <rpc/blockchain.h>
  #include <streams.h>
  +#include <test/util/setup_common.h>
  #include <validation.h>
  #include <univalue.h>
  static void BlockToJsonVerbose(benchmark::Bench& bench)
  {
  + TestingSetup test_setup{};
  +
  CDataStream stream(benchmark::data::block413567, SER_NETWORK, PROTOCOL_VERSION);
  char a = '\0';
  stream.write(&a, 1); // Prevent compaction
  