Reduce ADS change viewmodel FOV/offsets issue on dedicated servers

[nullsystem]

• DRAFT: Gonna redo this a different way [REPLACED BY #360]
• NOTE: Unfortunately testing this can be rather inconsistent, sometimes it seems fine, sometimes it seems really not fine. So look and compare to how it was multiple times then decide if this is any better or not. Both dedicated and loopback must be tested so either one aren't negatively affected.
• I don't consider this an absolute fix as the problem haven't fully gone away, but rather the issue of it happening reduced.
• Contrary to the reported issue, this happens on both Windows and Linux
• Offsets changes are basically refactors, but FOV changes is greatly simplified and should generally be more robust since it's changed from timing range-based to delta-based
• Speed up the timing on switching ADS by almost half, which would actually make it more similar to OG:NT ADS switching time. This would also make the ADS viewmodel change issue a bit less obvious if it occurs.
• fixes #284

[nullsystem]

I'm pulling this to draft for now, going to split the player (not viewmodel) FOV timings to a separate PR as it's not relevant to this specific bug, and also relook at a different strategy as it seemed to make the viewmodel change looked non-linear.

[nullsystem]

Im going to close this in favor of a better solution im gonna put as a new PR instead

[nullsystem]

This PR is replaced by: https://github.com/NeotokyoRebuild/neo/pull/360