Revert "Removes withdrawal effect messages from ambrosia extract"

[FlamingLily]

Reverts #20971

That PR just broke ambrosia entirely. No withdrawal messages, but also no effect messages or any other messages whatsoever.

[FlamingLily]

!bugfix

[FlamingLily]

!review

[Jasorn]

This doesn't fix the problem. I tested it, the messages from ambrosia still happens.

What you're missing is the parent drug var:

var/list/initial_effect_message_list = list("You close your eyes, and when they open, everything appears so much more vibrant.", "You feel a wave of pleasure suddenly rush over you.", "This is already the best decision you've ever made.")

Remove the list from above, or set the:
/singleton/reagent/drugs/final_effect

to just return