Tacmap: Chestburst marines appear with revive icons instead of flatline icons

[Wintermote]

Testmerges

#3088, #3185, #3298, #3424, #3430, #3271, #3392

Description of the bug

If a marine chestbursts while nested, the tacmap icon shows they are revivable instead of permadead

What's the difference with what should have happened?

If a marine chestbursts while nested, their tacmap icon should show that they are permanently deceased and not that they are revivable

How do we reproduce this bug?

1. Infect a marine with a chestburster and place him in a wall nest
2. Go to the overwatch console and open the tactical map
3. Wait for the marine to chestburst
4. After the marine has chestburst his tacmap icon will indicate he is revivable with a green heart, instead of deceased with a red flatline

Issue Bingo

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