Refactors Admin Setups on Forced Events + Refactors Vending Sentience + Refactors Shuttle Loans (#72998)

## About The Pull Request

- [x] TEST EVERYTHING
tested:
- Pirates
- Vending Machines
- Shuttle Catastrophe
- Anomalies
- Immovable Rod
- Sandstorms
- Scrubber Overflow
- Stray Meteor
- Madness
- Department Revolt (Well obviously, it is my super robust code after
all)
- Shuttle Loan
- Mass Hallucination
- Heart Attack
- False Alarm

Disease Outbreak is probably fine aha... It correctly reports that there
are no candidates before aborting.

#### The biggest change you'll notice is that some admin setup questions
allow you to let the game decide where previously you had to choose!

### Refactors Admin Setups on Forced Events

I need to refactor and datumize how admins set up special conditions on
forced events, so I did! Now `/datum/event_admin_setup` handles admin
settings, with a few prototypes to make it easier to give events admin
options in the future. This was exhausting and what 90% of the pr is.

### Refactors Vending Sentience

The code was so bad I could not datumize the admin part of it so I
cleaned it up, making a lot of things in the event get decided in
`setup()` where they should.

### Refactors Shuttle Loans

The code was so bad I could not datumize the admin part of it so I
cleaned it up AS WELL, by datumizing the shuttle loans. Should be easier
to add more types in the future, actually kinda stoked.

## Why It's Good For The Game

This is preparation for a tgui change to ForceEvent.ts an admin has
requested. Phew!

## Changelog
🆑
refactor: Refactored a bunch of admin-related event code, hopefully you
won't notice much
admin: ... But you specifically may notice some minor differences. Raw
inputs changed into tgui ones, minor soul removal, etc.
/🆑

code/modules/admin/force_event.dm

@@ -88,7 +88,7 @@
 			var/datum/round_event_control/event = locate(event_to_run_type) in SSevents.control
 			if(!event)
 				return
-			if(event.admin_setup(usr) == ADMIN_CANCEL_EVENT)
+			if(event.admin_setup && event.admin_setup.prompt_admins() == ADMIN_CANCEL_EVENT)
 				return
 			var/always_announce_chance = 100
 			var/no_announce_chance = 0