Move all owned NPCs together with player on Team Switching

[Zanieon]

I am aware of #721 existence and also address #649, however on doing tests with the PvP glitch in Frontier Defense, the problem of player switching teams does not lie only on Hacked Spectres, the player's own Auto-Titan will not switch, as well whatever Turrets they placed or Ticks they tossed.

This is my approach to fixing all those issue in one go, while also including a missing feature from Respawn's code that notify when players switches teams.

[catornot]

worked in a test server and I approve of the code :)

altought this pr won't work if the team is set directly

live footage of this working :

output.mp4

github is mean so I set the bitrate of the video to 100k >:(

[GeckoEidechse]

Merging based on previous review.
(although technically this didn't get proper code review but oh well ig)