Widen MotionLayerState stat counters from uint32 to uint64 (#1647)

MotionLayerState accumulates stats across all MotionNodeEntry instances.
Per-node entries already use uint64. The global sum ≥ any individual
node, so it overflows first — at 4GB. Fix by widening to uint64.

Also fix the debug elog() format specifiers to match.

Author: NJrslv

src/backend/cdb/motion/cdbmotion.c

@@ -133,8 +133,8 @@ RemoveMotionLayer(MotionLayerState *mlStates)
 	/* Emit statistics to log */
 	if (gp_log_interconnect >= GPVARS_VERBOSITY_VERBOSE)
 		elog(LOG, "RemoveMotionLayer(): dumping stats\n"
-			 "      Sent: %9u chunks %9u total bytes %9u tuple bytes\n"
-			 "  Received: %9u chunks %9u total bytes %9u tuple bytes; "
+			 "      Sent: %9" INT64_MODIFIER "u chunks %9" INT64_MODIFIER "u total bytes %9" INT64_MODIFIER "u tuple bytes\n"
+			 "  Received: %9" INT64_MODIFIER "u chunks %9" INT64_MODIFIER "u total bytes %9" INT64_MODIFIER "u tuple bytes; "
 			 "%9u chunkproc calls\n",
 			 mlStates->stat_total_chunks_sent,
 			 mlStates->stat_total_bytes_sent,

src/include/cdb/cdbinterconnect.h

@@ -154,13 +154,13 @@ typedef struct MotionLayerState
 	/*
 	 * GLOBAL MOTION-LAYER STATISTICS
 	 */
-	uint32		stat_total_chunks_sent; /* Tuple-chunks sent. */
-	uint32		stat_total_bytes_sent;	/* Bytes sent, including headers. */
-	uint32		stat_tuple_bytes_sent;	/* Bytes of pure tuple-data sent. */
+	uint64		stat_total_chunks_sent; /* Tuple-chunks sent. */
+	uint64		stat_total_bytes_sent;	/* Bytes sent, including headers. */
+	uint64		stat_tuple_bytes_sent;	/* Bytes of pure tuple-data sent. */
 
-	uint32		stat_total_chunks_recvd;/* Tuple-chunks received. */
-	uint32		stat_total_bytes_recvd; /* Bytes received, including headers. */
-	uint32		stat_tuple_bytes_recvd; /* Bytes of pure tuple-data received. */
+	uint64		stat_total_chunks_recvd;/* Tuple-chunks received. */
+	uint64		stat_total_bytes_recvd; /* Bytes received, including headers. */
+	uint64		stat_tuple_bytes_recvd; /* Bytes of pure tuple-data received. */
 
 	uint32		stat_total_chunkproc_calls;		/* Calls to processIncomingChunks() */