Merge #17677: Activate watchonly wallet behavior for LegacySPKM only

e1e1442 Activate no-privkey -> ISMINE_WATCH_ONLY behavior for LegacySPKM only (Gregory Sanders)

Pull request description:

  Slight cleanup following bitcoin/bitcoin#16944

  This should allow future scriptpubkeymans to transparently work, since the current plan is to have ismine always be spendable.

ACKs for top commit:
  achow101:
    ACK e1e1442
  Sjors:
    Code review ACK e1e1442
  meshcollider:
    Code review ACK e1e1442

Tree-SHA512: c0a86587d33b8b1646494a5cb0bf8681ee4a88e6913918157746943a0996b501903e0e6ee954cf04154c1e0faee0cbb375c74ca789f46ba9244eb5296632b042

Author: meshcollider

src/wallet/wallet.cpp

@@ -2183,8 +2183,8 @@ std::map<CTxDestination, std::vector<COutput>> CWallet::ListCoins(interfaces::Ch
 
     std::vector<COutPoint> lockedCoins;
     ListLockedCoins(lockedCoins);
-    // Include watch-only for wallets without private keys
-    const bool include_watch_only = IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS);
+    // Include watch-only for LegacyScriptPubKeyMan wallets without private keys
+    const bool include_watch_only = GetLegacyScriptPubKeyMan() && IsWalletFlagSet(WALLET_FLAG_DISABLE_PRIVATE_KEYS);
     const isminetype is_mine_filter = include_watch_only ? ISMINE_WATCH_ONLY : ISMINE_SPENDABLE;
     for (const COutPoint& output : lockedCoins) {
         auto it = mapWallet.find(output.hash);