Merge bitcoin/bitcoin#30122: bench: enable wallet creation benchmarks on all platforms

7c8abf3 bench: bugfix, properly release wallet before erasing directory (furszy)

Pull request description:

  Simple fix for #29816.

  Since the wallet is appended to the global `WalletContext` during
  creation, merely calling `reset()` on the benchmark shared_pointer
  is insufficient to destruct the wallet. This no destruction of the
  wallet object results in keeping the db connection open, which
  was causes the `fs::remove_all()` failure on Windows.

ACKs for top commit:
  maflcko:
    utACK 7c8abf3
  kevkevinpal:
    utACK [7c8abf3](bitcoin/bitcoin@7c8abf3)
  hebasto:
    re-ACK 7c8abf3, I agree with changes since my recent [review](bitcoin/bitcoin#30122 (review)).

Tree-SHA512: 279df65bea8f7aa02af0a2efed62dca9bf9b29cb748eb369c602d223e08a8a907dea7b1bffbd3dab91b1656c1d91b18a9a0534bc3f153bd751414b0e6230b3a4

Author: fanquake

src/bench/wallet_create.cpp

@@ -34,29 +34,25 @@ static void WalletCreate(benchmark::Bench& bench, bool encrypted)
     bilingual_str error_string;
     std::vector<bilingual_str> warnings;
 
-    fs::path wallet_path = test_setup->m_path_root / strprintf("test_wallet_%d", random.rand32()).c_str();
+    auto wallet_path = fs::PathToString(test_setup->m_path_root / "test_wallet");
     bench.run([&] {
-        auto wallet = CreateWallet(context, wallet_path.utf8string(), /*load_on_start=*/std::nullopt, options, status, error_string, warnings);
+        auto wallet = CreateWallet(context, wallet_path, /*load_on_start=*/std::nullopt, options, status, error_string, warnings);
         assert(status == DatabaseStatus::SUCCESS);
         assert(wallet != nullptr);
 
-        // Cleanup
-        wallet.reset();
+        // Release wallet
+        RemoveWallet(context, wallet, /*load_on_start=*/ std::nullopt);
+        UnloadWallet(std::move(wallet));
         fs::remove_all(wallet_path);
     });
 }
 
 static void WalletCreatePlain(benchmark::Bench& bench) { WalletCreate(bench, /*encrypted=*/false); }
 static void WalletCreateEncrypted(benchmark::Bench& bench) { WalletCreate(bench, /*encrypted=*/true); }
 
-#ifndef _MSC_VER
-// TODO: Being built with MSVC, the fs::remove_all() call in
-// the WalletCreate() fails with the error "The process cannot
-// access the file because it is being used by another process."
 #ifdef USE_SQLITE
 BENCHMARK(WalletCreatePlain, benchmark::PriorityLevel::LOW);
 BENCHMARK(WalletCreateEncrypted, benchmark::PriorityLevel::LOW);
 #endif
-#endif
 
 } // namespace wallet