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/test/fuzz/policy_estimator.cpp

@@ -2,6 +2,7 @@
 // Distributed under the MIT software license, see the accompanying
 // file COPYING or http://www.opensource.org/licenses/mit-license.php.
 
+#include <kernel/mempool_entry.h>
 #include <policy/fees.h>
 #include <policy/fees_args.h>
 #include <primitives/transaction.h>
@@ -11,7 +12,6 @@
 #include <test/fuzz/util/mempool.h>
 #include <test/util/setup_common.h>
 #include <txmempool.h>
-#include <txmempool_entry.h>
 
 #include <cstdint>
 #include <optional>

src/test/fuzz/util/mempool.cpp

@@ -4,11 +4,11 @@
 
 #include <consensus/amount.h>
 #include <consensus/consensus.h>
+#include <kernel/mempool_entry.h>
 #include <primitives/transaction.h>
 #include <test/fuzz/FuzzedDataProvider.h>
 #include <test/fuzz/util.h>
 #include <test/fuzz/util/mempool.h>
-#include <txmempool_entry.h>
 
 #include <cassert>
 #include <cstdint>

src/test/fuzz/util/mempool.h

@@ -5,7 +5,7 @@
 #ifndef BITCOIN_TEST_FUZZ_UTIL_MEMPOOL_H
 #define BITCOIN_TEST_FUZZ_UTIL_MEMPOOL_H
 
-#include <txmempool_entry.h>
+#include <kernel/mempool_entry.h>
 #include <validation.h>
 
 class CTransaction;

src/test/util/setup_common.cpp

@@ -17,6 +17,7 @@
 #include <init.h>
 #include <init/common.h>
 #include <interfaces/chain.h>
+#include <kernel/mempool_entry.h>
 #include <net.h>
 #include <net_processing.h>
 #include <node/blockstorage.h>
@@ -41,7 +42,6 @@
 #include <timedata.h>
 #include <txdb.h>
 #include <txmempool.h>
-#include <txmempool_entry.h>
 #include <util/strencodings.h>
 #include <util/string.h>
 #include <util/thread.h>