Merge bitcoin/bitcoin#26609: refactor: Move txmempool_entry.h --> kernel/mempool_entry.h

38941a703e refactor: Move `txmempool_entry.h` --> `kernel/mempool_entry.h` (Hennadii Stepanov)

Pull request description:

  This PR addresses the https://github.com/bitcoin/bitcoin/pull/17786#discussion_r1027818360:
  > why not move it to the right place, that is to `kernel/txmempool_entry.h`?

ACKs for top commit:
  MarcoFalke:
    review ACK 38941a703e 📊

Tree-SHA512: 0145974b63b67ca1d9d89af2dd9d4438beca480c16a563f330da05fec49b8394d7ba20ed83cf7d50b2e19454e006978ebed42b0e07887b98d00210f3201ce9ba

src/node/interfaces.cpp

@@ -15,17 +15,18 @@
 #include <interfaces/handler.h>
 #include <interfaces/node.h>
 #include <interfaces/wallet.h>
+#include <kernel/chain.h>
+#include <kernel/mempool_entry.h>
 #include <mapport.h>
 #include <net.h>
 #include <net_processing.h>
 #include <netaddress.h>
 #include <netbase.h>
 #include <node/blockstorage.h>
-#include <kernel/chain.h>
 #include <node/coin.h>
 #include <node/context.h>
-#include <node/transaction.h>
 #include <node/interface_ui.h>
+#include <node/transaction.h>
 #include <policy/feerate.h>
 #include <policy/fees.h>
 #include <policy/policy.h>
@@ -39,7 +40,6 @@
 #include <support/allocators/secure.h>
 #include <sync.h>
 #include <txmempool.h>
-#include <txmempool_entry.h>
 #include <uint256.h>
 #include <univalue.h>
 #include <util/check.h>