Flak can kill through walls

### Testmerges

#4475, #4812, #4793, #4866, #4879, #4889

### Round ID

19483

### Description of the bug

I was standing behind a fully enclosed 1x1 room and the wall infront was hit by flak and the inhabitants of this room all died. It was pretty sad.

https://github.com/cmss13-devs/cmss13/assets/84825853/2d79723c-b1be-49fd-a46a-1a77a298ace9

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

I should be protected by the walls, the flak back blast should not penetrate the wall

### How do we reproduce this bug?

1. Stand in a fully enclosed 1x1 resin room
2. Have a tank infront of this resin room, with the flak cannon
3. The tank shoots the resin wall
4. Die
5. See error.

### Issue Bingo

- [ ] 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)