[MOVEONLY] consensus: move amount.h into consensus

Move amount.h to consensus/amount.h.
Renames, adds missing and removes uneeded includes.

src/node/psbt.cpp

@@ -2,8 +2,8 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
-#include <amount.h>
 #include <coins.h>
+#include <consensus/amount.h>
 #include <consensus/tx_verify.h>
 #include <node/psbt.h>
 #include <policy/policy.h>