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/test/walletdb_tests.cpp

@@ -24,7 +24,7 @@ BOOST_AUTO_TEST_CASE(walletdb_readkeyvalue)
      * silently fail. The test here makes sure the type of exception thrown from CDataStream::read()
      * matches the type we expect, otherwise we need to update the "key"/"wkey" exception type caught.
      */
-    CDataStream ssValue(SER_DISK, CLIENT_VERSION);
+    DataStream ssValue{};
     uint256 dummy;
     BOOST_CHECK_THROW(ssValue >> dummy, std::ios_base::failure);
 }