Move enum RecoveryTargetAction to xlogrecovery.h

Commit 70e81861fa split out xlogrecovery.c/h and moved some enums
related to recovery targets to xlogrecovery.h. However, it seems that
the enum RecoveryTargetAction was inadvertently left out by that commit.
This commit moves it to xlogrecovery.h for consistency.

Author: Kyotaro Horiguchi <horikyota.ntt@gmail.com>
Discussion: https://postgr.es/m/20240904.173013.1132986940678039655.horikyota.ntt@gmail.com

src/include/access/xlog_internal.h

@@ -316,16 +316,6 @@ typedef struct XLogRecData
 	uint32		len;			/* length of rmgr data to include */
 } XLogRecData;
 
-/*
- * Recovery target action.
- */
-typedef enum
-{
-	RECOVERY_TARGET_ACTION_PAUSE,
-	RECOVERY_TARGET_ACTION_PROMOTE,
-	RECOVERY_TARGET_ACTION_SHUTDOWN,
-}			RecoveryTargetAction;
-
 struct LogicalDecodingContext;
 struct XLogRecordBuffer;
 

src/include/access/xlogrecovery.h

@@ -40,6 +40,16 @@ typedef enum
 	RECOVERY_TARGET_TIMELINE_NUMERIC,
 } RecoveryTargetTimeLineGoal;
 
+/*
+ * Recovery target action.
+ */
+typedef enum
+{
+	RECOVERY_TARGET_ACTION_PAUSE,
+	RECOVERY_TARGET_ACTION_PROMOTE,
+	RECOVERY_TARGET_ACTION_SHUTDOWN,
+}			RecoveryTargetAction;
+
 /* Recovery pause states */
 typedef enum RecoveryPauseState
 {