add saline glucose solution to blacklist for medical chem allergy (#92476)

## About The Pull Request

Adds saline-glucose solution to the blacklist for medical chems you can
be allergic to, thus removing it as a thing you can be allergic to.

## Why It's Good For The Game

You can eat salt, water, and anything with sugar to have an immediate
life-threatening reaction to fundamentally required chemicals within
most organisms' systems.
I know you're opting into massive random inconvenience/harm/death when
you're deranged enough to pick this trait, but this seems a bit crueller
than intended.

If someone can convince me that slightly salty sugar water is actually
something you can totally be allergic to, I am going to sprinkle some
salt into a can of soda and drink it before them and magically not die
(and the can of soda would 100% be far more chemically damaging than
saline glucose solution could be)

## Changelog

🆑
balance: You will no longer be allergic to saline-glucose solution.
/🆑

---------

Co-authored-by: MrMelbert <51863163+MrMelbert@users.noreply.github.com>
# Conflicts:
#	code/datums/quirks/negative_quirks/allergic.dm

code/datums/quirks/negative_quirks/allergic.dm

@@ -21,6 +21,7 @@
 		/datum/reagent/medicine/synaphydramine,
 		/datum/reagent/medicine/diphenhydramine,
 		/datum/reagent/medicine/sansufentanyl,
+		/datum/reagent/medicine/salglu_solution,
 		/datum/reagent/medicine/coagulant       //Bubber edit: adds coagulant
 		)
 	var/allergy_string