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.
{
    LOCK2(cs_main, m_node.mempool->cs);
    
    assert(m_node.mempool->size() == 0);
    
    
    assert(target_feerate > m_node.mempool->m_incremental_relay_feerate);
    
    assert(target_feerate > m_node.mempool->m_min_relay_feerate);
    
    
    CMutableTransaction mtx = CMutableTransaction();
    mtx.vin.emplace_back(COutPoint{Txid::FromUint256(g_insecure_rand_ctx.rand256()), 0});
    mtx.vout.emplace_back(1 * COIN, GetScriptForDestination(WitnessV0ScriptHash(CScript() << OP_TRUE)));
    const auto tx{MakeTransactionRef(mtx)};
    LockPoints lp;
    
    const auto tx_fee = target_feerate.GetFee(GetVirtualTransactionSize(*tx)) -
        m_node.mempool->m_incremental_relay_feerate.GetFee(GetVirtualTransactionSize(*tx));
    m_node.mempool->addUnchecked(CTxMemPoolEntry(tx, tx_fee,
                                                 0, 1, 0,
                                                 true, 1, lp));
    m_node.mempool->TrimToSize(0);
    assert(m_node.mempool->GetMinFee() == target_feerate);
}
/**
 * @returns a real block (0000000000013b8ab2cd513b0261a14096412195a72a0c4827d229dcc7e0f7af)
 *      with 9 txs.
 */
CBlock getBlock13b8a()