Add async teleporting

[masagameplay]

I am currently running

• SpongeForge version:
• SpongeVanilla version: 1.16..5-8.0.0-RC819
• Java version: 11.0.11
• Operating System: Windows 10

Issue Description Could we have something similar to Paper's teleportAsync?

Comments from Discord:

gabizou — Today at 8:54 PM Maybe make it where it could even take a biconsumer for the player and location after teleport, since that can be supplied, then it’s guaranteed that the completablefuture isn’t abused.