Merge bitcoin/bitcoin#23083: rpc: Fail to return undocumented or misdocumented JSON

fc892c3a80 rpc: Fail to return undocumented or misdocumented JSON (MarcoFalke)
f4bc4a705a rpc: Add m_skip_type_check to RPCResult (MarcoFalke)

Pull request description:

  This avoids documentation shortcomings such as the ones fixed in commit e7b6272b30, 138d55e6a0, 577bd51a4b, f8c84e047c, 0ee9a00f90, 13f41855c5, or faecb2ee0a

ACKs for top commit:
  fanquake:
    ACK fc892c3a80 - tested that this catches issue, i.e #24691:

Tree-SHA512: 9d0d7e6291bfc6f67541a4ff746d374ad8751fefcff6d103d8621c0298b190ab1d209ce96cfc3a0d4a6a5460a9f9bb790eb96027b16e5ff91f2512e40c92ca84

src/wallet/rpc/wallet.cpp

@@ -56,7 +56,7 @@ static RPCHelpMan getwalletinfo()
                         {
                             {RPCResult::Type::NUM, "duration", "elapsed seconds since scan start"},
                             {RPCResult::Type::NUM, "progress", "scanning progress percentage [0.0, 1.0]"},
-                        }},
+                        }, /*skip_type_check=*/true},
                         {RPCResult::Type::BOOL, "descriptors", "whether this wallet uses descriptors for scriptPubKey management"},
                         {RPCResult::Type::BOOL, "external_signer", "whether this wallet is configured to use an external signer such as a hardware wallet"},
                     }},