Persistent Map Vote Tallies (#86788)

## About The Pull Request

Changes map votes to be based on a persistent tally count.
Tallies for maps are cached between rounds and are added to by map
votes.
When a map is chosen, and it wasn't the only valid one, the tallies for
said chosen map will be reset.

Refactors map vote handling and moves it from SSmapping to SSmap_vote.
Rock the Vote has been removed as a result of this refactor.

## Why It's Good For The Game

Makes it more likely that all maps will be played over the course of a
server instead of always being truly random.
Removes some clutter off of SSmapping.

🆑
refactor: Map Votes are now carried over between rounds. When a map vote
is actually a contest, the winning map will have its votes reset.
/🆑

code/modules/client/verbs/ooc.dm

@@ -456,3 +456,9 @@ ADMIN_VERB(reset_ooc_color, R_FUN, "Reset Player OOC Color", "Returns player OOC
 	ASSERT(prefs, "User attempted to export preferences while preferences were null!") // what the fuck
 
 	prefs.savefile.export_json_to_client(usr, ckey)
+
+/client/verb/map_vote_tally_count()
+	set name = "Show Map Vote Tallies"
+	set desc = "View the current map vote tally counts."
+	set category = "Server"
+	to_chat(mob, SSmap_vote.tally_printout)