Vote clean up and admin additions (#82981)

## About The Pull Request

- Fixes `vote_delay` not being a thing. I broke this two years ago but
there's no bug report associated.

- Admins can now reset the vote delay (to let people vote again
instantly)

- Admins can now end the current vote immediately (rather than
cancelling)

- Custom multi and custom single combined into one vote

## Why It's Good For The Game

Makes voting a bit easier to use, both for admins and for coders adding
new votes.


![image](https://github.com/tgstation/tgstation/assets/51863163/40b8857c-76b7-4a58-82bc-1b82640d550a)

## Changelog

🆑 Melbert
admin: Custom Single and Custom Multi votes are now combined into one
vote
admin: Admins can now end votes instantly, rather than cancelling them
admin: Admins can now reset the vote cooldown
fix: Vote cooldown actually applies now
/🆑

code/controllers/configuration/entries/general.dm

@@ -184,13 +184,13 @@
 
 /// minimum time between voting sessions (deciseconds, 10 minute default)
 /datum/config_entry/number/vote_delay
-	default = 6000
+	default = 10 MINUTES
 	integer = FALSE
 	min_val = 0
 
 /// length of voting period (deciseconds, default 1 minute)
 /datum/config_entry/number/vote_period
-	default = 600
+	default = 1 MINUTES
 	integer = FALSE
 	min_val = 0