Don't send synced player data on join

[Owen1212055]

Fixes https://github.com/PaperMC/Paper/issues/4793 Supercedes https://github.com/PaperMC/Paper/pull/5139

(Vanilla does not normally send entity data here at all) The issue is it reintroduces some of the issues specified in: https://github.com/SpigotMC/BungeeCord/issues/2321

Opinions here?

[Owen1212055]

Tux says that this issue it fixes probably doesn’t exist for velocity proxies but might still be an issue for bungeecord.

So this will need to be tested with velocity most likely, but if the issue is still prevalent with bungee im not sure what we should do here. Should this be behind a config or just activate this if a proxy is used and it isn’t velocity? (I’m not sure how you can just detect if ur using bungee)

https://discord.com/channels/289587909051416579/908507886420910101/1023775699531739217

[electronicboy]

The underlaying issue is also potentially fixed on bungeecord too, at least for recent releases with the dim registry

[Owen1212055]

Ah nice, then I’ll test this on bungee when I get the chance to.