Sync leviathans gameplay

[tornac1234]

Creature sync:

• [x] Sync Reaper Leviathans
• [x] Sync Sea Dragons
• [x] Sync Sea Treaders

Creature behaviours:

• [x] Sync leviathans attacking cyclops
• [x] Sync leviathans attacking a player or vehicle (seamoth or exosuit)

Weapon sync:

• [x] Sync statis rifle
• [x] Sync torpedos (better than current implementation)

Other related issues:

• [x] Fix player vitals not showing a creative player's name
• [x] Fix seamoth not spawning module inventory
• [x] Adds an InfectedMixin and a LiveMixin on remote players to ensure they're potential targets

TODO when everything is done: ~~- [ ] Ensure crash fishes can target other players~~ POSTPONED to another PR (will be short but required both this one and #2101 )

[tornac1234]

Would require some tests :)

[tornac1234]

There's still the following to be looked into (but most of the code is ready for review):

• ~~sometimes, move animation are chunky and you can see a small jump~~ (FIXED)
• when another player gets eaten by a leviathan, they broadcast the related cinematic which is played on other players so a black screen appears as if they got eaten themselves by a leviathan (but they didn't)

[tornac1234]

The latest Sea Dragons sync code wasn't tested because it's really hard without #2113