[MERGED PR] Joining round as observer prevents the RP Respawn Timer from applying

[Isane]

My primary concern initially was gang recruitment, which the most recent change to the PR addresses. While I'm not the biggest fan of this PR overall, I understand the need and I do definitely feel at the very least that security (and possibly command) roles should be disabled if you observe due to their ability to impact the round. Far too often I will see a flood of security either 10 minutes after round start, once an antag starts popping off, or when the armory is opened or a syndiesona makes an announcement (which is another can of worms outside this topic since those can be seen before joining anyway).

Does joining a round, then going to cryo to observe also remove the ability to respawn, since I can see that being used to get around this.