drug fixes - kronkaine buff now stops after metabolizing out, removes some bad vars (#79661)

## About The Pull Request
- kronkaine's buff now ends after metabolizing (done by removing its id,
which was more used for stimulant addictions anyway)
- many drugs's moodlets now time out properly (done by removing the name
parameter, since it made it multiply out to 0)

## Why It's Good For The Game
maybe giving people permanent 2x do_after speed is Suboptimal
maybe drug moodlets also shouldn't last forever somehow
## Changelog

🆑
fix: Kronkaine's action speed buff now stops when metabolized out.
fix: Drug-related moodlets should now time out properly. They still
linger after metabolization ends, but they no longer last forever.
/🆑

---------

Co-authored-by: Hatterhat <Hatterhat@users.noreply.github.com>
Co-authored-by: Jacquerel <hnevard@gmail.com>

code/modules/actionspeed/modifiers/drugs.dm

@@ -1,3 +1,2 @@
 /datum/actionspeed_modifier/kronkaine
 	multiplicative_slowdown = -0.5
-	id = ACTIONSPEED_ID_STIMULANTS