Do not rely on pgstat.h to indirectly include storage/ headers.

An upcoming patch might remove the (now indirect) proc.h
include (which in turn includes other headers), and it's cleaner for
the modified files to include their dependencies directly anyway...

Discussion: https://postgr.es/m/20210402194458.2vu324hkk2djq6ce@alap3.anarazel.de

contrib/pg_stat_statements/pg_stat_statements.c

@@ -76,6 +76,8 @@
 #include "pgstat.h"
 #include "storage/fd.h"
 #include "storage/ipc.h"
+#include "storage/lwlock.h"
+#include "storage/shmem.h"
 #include "storage/spin.h"
 #include "tcop/utility.h"
 #include "utils/acl.h"

src/backend/postmaster/pgarch.c

@@ -44,7 +44,9 @@
 #include "storage/ipc.h"
 #include "storage/latch.h"
 #include "storage/pmsignal.h"
+#include "storage/proc.h"
 #include "storage/procsignal.h"
+#include "storage/shmem.h"
 #include "utils/guc.h"
 #include "utils/ps_status.h"
 

src/backend/postmaster/pgstat.c

@@ -61,6 +61,7 @@
 #include "storage/latch.h"
 #include "storage/lmgr.h"
 #include "storage/pg_shmem.h"
+#include "storage/proc.h"
 #include "storage/procsignal.h"
 #include "storage/sinvaladt.h"
 #include "utils/ascii.h"

src/backend/replication/walreceiver.c

@@ -69,6 +69,7 @@
 #include "replication/walsender.h"
 #include "storage/ipc.h"
 #include "storage/pmsignal.h"
+#include "storage/proc.h"
 #include "storage/procarray.h"
 #include "storage/procsignal.h"
 #include "utils/acl.h"

src/backend/storage/lmgr/lmgr.c

@@ -23,6 +23,7 @@
 #include "miscadmin.h"
 #include "pgstat.h"
 #include "storage/lmgr.h"
+#include "storage/proc.h"
 #include "storage/procarray.h"
 #include "storage/sinvaladt.h"
 #include "utils/inval.h"

src/backend/utils/adt/misc.c

@@ -36,6 +36,7 @@
 #include "postmaster/syslogger.h"
 #include "rewrite/rewriteHandler.h"
 #include "storage/fd.h"
+#include "storage/latch.h"
 #include "tcop/tcopprot.h"
 #include "utils/builtins.h"
 #include "utils/fmgroids.h"