Fix bad streaming performance in some cases

[TheNormalnij]

Fixes #813 and #3985

This PR disables streaming for elements that are outside of the current dimension. This increases performance for servers that have a lot of elements in different dimensions.

This PR fixes this bugged scenario too:

1. A player spawns at 0, 0, 3 position
2. The gamemode creates a lot of objects
3. The player has random fps drops on some map positions.

Why it happens:
MTA creates elements in 0, 0, 0 position by default. CClientStreamer adds these elements to the m_ActiveElements list.
MTA updates element positions BUT doesn't remove elements from the m_ActiveElements list.
This causes the situation when m_ActiveElements holds all possible elements and CClientStreamer requests huge O(N*M) operations.

This PR needs some testing.

[Xenius97]

Sadly this doesn't solve #3985

Debug
https://streamable.com/mxd937

Release - same as before:
https://streamable.com/8zs2m8

[TheNormalnij]

Ok, I optimized element streaming in different dimensions too.