[MC-268691] execute on attacker don't track non-living entities

no matter direct or indirect sources

execute on attacker

select nothing if it's marker, item, arrow, etc...

however, armor_stand is selected

Load the datapack from attachment
Drop an item and exeucte
```
/damage @s 1 generic by @e[type=item,limit=1]
```
The chat doesn't show anything (unexpected

Instead placing an armor_stand and execute
```
/damage @s 1 generic by @e[type=armor_stand,limit=1]
```
The chat shows the armor_stand say hi (expected