Trims excessive roundstart security guns (#3047)

## About The Pull Request

This PR removes the skyrat-added "gun beacons" that security officers
and the Head of Security are spawned into the game with.
In addition, moves the silver glock case from the Head of Security's
locker to the Warden's locker

## Why It's Good For The Game
Security officers already get a glock in their lockers (a bubber-added
glock) as a sidearm to use, there is little reason for them to spawn
with a SECOND sidearm on their person. Given this is Bubber, I preferred
to remove the Skyrat option over the native Bubber one.

This PR was originally intended to remove some of the **FIVE GUNS** that
the Head of Security has personally available to him at round-start.
This PR trimmed it down to three, and I gave the Warden a little love by
giving them the cool glock instead (the warden never gets anything
cool...). If the HoS really wants a glock or something else, they have
the means.

## Proof Of Testing
<details>
<summary>Screenshots/Videos</summary>

</details>

## Changelog
🆑
balance: Removed "sidearm beacons" from spawning SecOff and HoS
inventories. Complimentary glocks are still available in security
officer lockers.
balance: Gave the HoS's silver glock to the Warden. The Head of Security
only has three guns at roundstart now! How will he ever recover??
/🆑

code/modules/jobs/job_types/head_of_security.dm

@@ -57,7 +57,6 @@
 	suit_store = /obj/item/gun/energy/e_gun //BUBBER EDIT - REVERTS SKYRAT REMOVAL
 	backpack_contents = list(
 		/obj/item/evidencebag = 1,
-		/obj/item/choice_beacon/security_pistol = 1, //Skyrat Addition
 		)
 	belt = /obj/item/modular_computer/pda/heads/hos
 	ears = /obj/item/radio/headset/heads/hos/alt

code/modules/jobs/job_types/security_officer.dm

@@ -223,7 +223,6 @@ GLOBAL_LIST_EMPTY(security_officer_distribution)
 	suit_store = /obj/item/gun/energy/disabler
 	backpack_contents = list(
 		/obj/item/evidencebag = 1,
-		/obj/item/choice_beacon/security_pistol = 1, //SKYRAT ADDITION
 		/obj/item/flashlight/seclite = 1, // BUBBER EDIT ADDITION
 		)
 	belt = /obj/item/modular_computer/pda/security

modular_zubbers/code/modules/security/security_glock/lockers.dm

@@ -2,6 +2,6 @@
 	. = ..()
 	new /obj/item/storage/toolbox/guncase/skyrat/pistol/sec_glock(src)
 
-/obj/structure/closet/secure_closet/hos/PopulateContents()
+/obj/structure/closet/secure_closet/warden/PopulateContents()
 	. = ..()
-	new /obj/item/storage/toolbox/guncase/skyrat/pistol/hos_glock(src)
+	new /obj/item/storage/toolbox/guncase/skyrat/pistol/hos_glock(src)