scripted-diff: Use DataStream in most places

The remaining places are handled easier outside a scripted-diff.

-BEGIN VERIFY SCRIPT-
 sed --regexp-extended -i 's/CDataStream ([0-9a-zA-Z_]+)\(SER_[A-Z]+, [A-Z_]+_VERSION\);/DataStream \1{};/g' $( git grep -l CDataStream)
 sed -i 's/, CDataStream/, DataStream/g' src/wallet/walletdb.cpp
-END VERIFY SCRIPT-

src/wallet/db.h

@@ -67,7 +67,7 @@ public:
         ssKey.reserve(1000);
         ssKey << key;
 
-        CDataStream ssValue(SER_DISK, CLIENT_VERSION);
+        DataStream ssValue{};
         if (!ReadKey(std::move(ssKey), ssValue)) return false;
         try {
             ssValue >> value;
@@ -84,7 +84,7 @@ public:
         ssKey.reserve(1000);
         ssKey << key;
 
-        CDataStream ssValue(SER_DISK, CLIENT_VERSION);
+        DataStream ssValue{};
         ssValue.reserve(10000);
         ssValue << value;