voteweight in map setup does not work

### Testmerges

#11290: 'Ice v2 multizboogaloo DO NOT MERGE' by cuberound at commit 627d08965e

### Round ID

31541

### Description of the bug

Voteweight should multiply the number of votes but does not, no code for it exists

### What's the difference with what should have happened?

should multiply the votes by voteweight

### How do we reproduce this bug?

1. increase voteweight
2. vote for the map
3. still have one vote per vote
...

### Issue Bingo

- [x] Issue could be reproduced at least once
- [x] Issue happened in a recent (less than 7 days ago) round
- [x] Couldn't find an existing issue about this (https://github.com/cmss13-devs/cmss13/issues)