fix: Prevent players from playing the game as invisible

[SpirTBBX]

This pull request addresses an issue where players can join as spectator and still act like they were playing in a team.

Any allocator would still provide weapons to the players and they would be able to not only have xray, but to also kill other players while being invisible. The bug would stop happening to that specific player once somebody else could kill that player. This glitch will happen when the player joins and, as I've seen, only happens when the map changes (in the warmup phase).

For that, I changed when we force the player team to address the issue. Changing the team on the 1 second timer is not a problem, as the player takes more than a second to change from the loading screen to the select team screen.

Hope this helps.

This commit has been properly tested and is currently being used in my production servers.

Best Regards,
SpirT

[B3none]

A couple of changes to make, then it's good to merge.