Rewrites to fix compiler errors on 516.1670+ (#93801)

## About The Pull Request

Fixes all instances of numbers being used as assoc list keys in things
that aren't alists, either by turning them into alists or changing the
keys to something else. Also adds new macros to support creating global
alists, as a few global lists became alists. Most of these are pretty
simple and self-explanatory but
- The GLOB.huds one necessitated rewriting because code depended on it
being a non-assoc list, which it technically was because the defines it
used as keys were numbers so BYOND turned it into a regular list, most
of this was for loops through all the subtypes of
`/datum/atom_hud/data/diagnostic` of which there's only one, so I just
changed it to get that type directly by key
- NT Frontier used number indexes which it looped through for some
reason and also passed to TGUI, changed these to strings and adjusted
the TGUI to match, I tested this and it works fine

## Why It's Good For The Game

Makes the code compile, I couldn't test everything but I tried to check
all usages of affected vars to make sure they wouldn't break from being
switched to alists, a TM might be in order just to be sure nothing's
fucked

## Changelog
🆑
refactor: rewrote all cases of numbers being used as keys in non-alist
associative lists
/🆑

code/controllers/subsystem/processing/station.dm

@@ -7,7 +7,7 @@ PROCESSING_SUBSYSTEM_DEF(station)
 	///A list of currently active station traits
 	var/list/station_traits = list()
 	///Assoc list of trait type || assoc list of traits with weighted value. Used for picking traits from a specific category.
-	var/list/selectable_traits_by_types = list(STATION_TRAIT_POSITIVE = list(), STATION_TRAIT_NEUTRAL = list(), STATION_TRAIT_NEGATIVE = list())
+	var/alist/selectable_traits_by_types = alist(STATION_TRAIT_POSITIVE = list(), STATION_TRAIT_NEUTRAL = list(), STATION_TRAIT_NEGATIVE = list())
 	///Currently active announcer. Starts as a type but gets initialized after traits are selected
 	var/datum/centcom_announcer/announcer = /datum/centcom_announcer/default
 	///A list of trait roles that should be protected from antag