the value when specifying empty==other values is null instead of false

[abby-cyber]

related pr #5433

(root@nebula) [basketballplayer]> match (v:player) where v.player.age==30 return v.player.age
+--------------+
| v.player.age |
+--------------+
| 30           |
| 30           |
| 30           |
| 30           |
+--------------+
Got 4 rows (time spent 5746/6389 us)

Tue, 11 Apr 2023 18:08:25 CST

(root@nebula) [basketballplayer]> match (v:player) where v.player.age==30 return v.player.age==v.player.like
+-------------------------------+
| (v.player.age==v.player.like) |
+-------------------------------+
| __NULL__                      |
| __NULL__                      |
| __NULL__                      |
| __NULL__                      |
+-------------------------------+
Got 4 rows (time spent 3920/4480 us)

[xtcyclist]

v.player.like is NULL, not EMPTY. No bug here. It is known that behaviours around EMPTY are not well-implemented, and we are not going to fix it in 3.x.