Converts a bunch of time/delay vars to use time defines (#92495)

## About The Pull Request

Converts as many time vars expressed in deciseconds as I could find to
use time defines.

## Why It's Good For The Game

Makes these values neater and more readable.

## Changelog
🆑
code: Converted a lot of time-based variables to be expressed with time
defines.
/🆑

code/modules/mod/modules/modules_antag.dm

@@ -465,7 +465,7 @@
 	device = /obj/item/gun/medbeam/mod
 	incompatible_modules = list(/obj/item/mod/module/medbeam)
 	removable = TRUE
-	cooldown_time = 0.5
+	cooldown_time = 0.05 SECONDS
 	required_slots = list(ITEM_SLOT_BACK)
 
 /obj/item/gun/medbeam/mod