logging: use util/log.h where possible

Preparation for a future commit where kernel's dependency
on logging.cpp is removed completely.

Replace usage of logging\.h with util/log\.h where it
suffices, and fix wrong includes according to iwyu.

src/node/blockstorage.cpp

@@ -16,7 +16,6 @@
 #include <kernel/messagestartchars.h>
 #include <kernel/notifications_interface.h>
 #include <kernel/types.h>
-#include <logging.h>
 #include <pow.h>
 #include <primitives/block.h>
 #include <primitives/transaction.h>
@@ -31,6 +30,7 @@
 #include <util/check.h>
 #include <util/expected.h>
 #include <util/fs.h>
+#include <util/log.h>
 #include <util/obfuscation.h>
 #include <util/overflow.h>
 #include <util/result.h>

src/node/chainstate.cpp

@@ -9,7 +9,6 @@
 #include <coins.h>
 #include <consensus/params.h>
 #include <kernel/caches.h>
-#include <logging.h>
 #include <node/blockstorage.h>
 #include <sync.h>
 #include <threadsafety.h>
@@ -17,6 +16,7 @@
 #include <txdb.h>
 #include <uint256.h>
 #include <util/fs.h>
+#include <util/log.h>
 #include <util/signalinterrupt.h>
 #include <util/time.h>
 #include <util/translation.h>

src/node/utxo_snapshot.cpp

@@ -4,12 +4,12 @@
 
 #include <node/utxo_snapshot.h>
 
-#include <logging.h>
 #include <streams.h>
 #include <sync.h>
 #include <tinyformat.h>
 #include <uint256.h>
 #include <util/fs.h>
+#include <util/log.h>
 #include <validation.h>
 
 #include <cassert>