util: add TransactionError includes and namespace declarations

Add TransactionError to node namespace and include it directly instead of
relying on indirect include through common/messages.h

This is a followup to a previous commit which moved the TransactionError enum.
These changes were done in a separate followup just to keep the previous commit
more minimal and easy to review.

src/rpc/rawtransaction.cpp

@@ -16,6 +16,7 @@
 #include <node/context.h>
 #include <node/psbt.h>
 #include <node/transaction.h>
+#include <node/types.h>
 #include <policy/packages.h>
 #include <policy/policy.h>
 #include <policy/rbf.h>