Add m_last_block_processed_height field in CWallet

At BlockConnected/BlockDisconnected, we rely on height of block
itself to know current height of wallet

src/qt/test/wallettests.cpp

@@ -139,10 +139,12 @@ void TestGUI(interfaces::Node& node)
     wallet->LoadWallet(firstRun);
     {
         auto spk_man = wallet->GetLegacyScriptPubKeyMan();
+        auto locked_chain = wallet->chain().lock();
         LOCK(wallet->cs_wallet);
         AssertLockHeld(spk_man->cs_wallet);
         wallet->SetAddressBook(GetDestinationForKey(test.coinbaseKey.GetPubKey(), wallet->m_default_address_type), "", "receive");
         spk_man->AddKeyPubKey(test.coinbaseKey, test.coinbaseKey.GetPubKey());
+        wallet->SetLastBlockProcessed(105, ::ChainActive().Tip()->GetBlockHash());
     }
     {
         auto locked_chain = wallet->chain().lock();