Merge #9353: Add data() method to CDataStream (and use it)

5113474 wallet: Use CDataStream.data() (Wladimir J. van der Laan)
e2300ff bench: Use CDataStream.data() (Wladimir J. van der Laan)
adff950 dbwrapper: Use new .data() method of CDataStream (Wladimir J. van der Laan)
a2141e4 streams: Remove special cases for ancient MSVC (Wladimir J. van der Laan)
af4c44c streams: Add data() method to CDataStream (Wladimir J. van der Laan)

src/bench/verify_script.cpp

@@ -93,7 +93,7 @@ static void VerifyScriptBench(benchmark::State& state)
             txCredit.vout[0].scriptPubKey.data(),
             txCredit.vout[0].scriptPubKey.size(),
             txCredit.vout[0].nValue,
-            (const unsigned char*)&stream[0], stream.size(), 0, flags, nullptr);
+            (const unsigned char*)stream.data(), stream.size(), 0, flags, nullptr);
         assert(csuccess == 1);
 #endif
     }