When compiling without external signer support, the resulted `bench_bitcoin.exe` fails on Windows:
```
>.\bench_bitcoin.exe -filter=AddrManSelectByNetwork
Error: bad optional access
```

Steps to reproduce the failure:
- cross compiling on Ubuntu 22.04:
```
$ make -j $(nproc) -C depends HOST=x86_64-w64-mingw32 NO_QT=1
$ ./autogen.sh
$ ./configure CONFIG_SITE=$PWD/depends/x86_64-w64-mingw32/share/config.site --disable-external-signer
$ make -j $(nproc)
```
- compiling natively on Windows:

Apply the diff as follows:
```diff
--- a/build_msvc/bitcoin_config.h.in
+++ b/build_msvc/bitcoin_config.h.in
@@ -41,9 +41,6 @@
 /* Define this symbol to enable ZMQ functions */
 #define ENABLE_ZMQ 1
 
-/* define if external signer support is enabled (requires Boost::Process) */
-#define ENABLE_EXTERNAL_SIGNER /**/
-
 /* Define to 1 if you have the declaration of `be16toh', and to 0 if you
    don't. */
 #define HAVE_DECL_BE16TOH 0
```
Then
```
>py -3 build_msvc\msvc-autogen.py
>msbuild build_msvc\bitcoin.sln -property:Configuration=Release -verbosity:minimal
>src\bench_bitcoin.exe -filter=AddrManSelectByNetwork
Error: bad optional access
```

---

The failure does not manifest itself when running `bench_bitcoin.exe` using Wine on Linux.
{
    m_node.kernel.reset();
    SetMockTime(0s); 
    LogInstance().DisconnectTestLogger();
    fs::remove_all(m_path_root);
    gArgs.ClearArgs();
}
ChainTestingSetup::ChainTestingSetup(const ChainType chainType, const std::vector<const char*>& extra_args)
    : BasicTestingSetup(chainType, extra_args)
{
    const CChainParams& chainparams = Params();
    
    
    m_node.scheduler = std::make_unique<CScheduler>();
    m_node.scheduler->m_service_thread = std::thread(util::TraceThread, "scheduler", [&] { m_node.scheduler->serviceQueue(); });
    GetMainSignals().RegisterBackgroundSignalScheduler(*m_node.scheduler);
    m_node.fee_estimator = std::make_unique<CBlockPolicyEstimator>(FeeestPath(*m_node.args), DEFAULT_ACCEPT_STALE_FEE_ESTIMATES);
    m_node.mempool = std::make_unique<CTxMemPool>(MemPoolOptionsForTest(m_node));
    m_cache_sizes = CalculateCacheSizes(m_args);
    m_node.notifications = std::make_unique<KernelNotifications>(m_node.exit_status);
    const ChainstateManager::Options chainman_opts{
        .chainparams = chainparams,
        .datadir = m_args.GetDataDirNet(),
        .adjusted_time_callback = GetAdjustedTime,
        .check_block_index = true,
        .notifications = *m_node.notifications,
    };