Performance test

[averydev]

Added a simple performance test. There is a slight performance dip on basic records, but it's fairly modest.
Averages are needed here because otherwise v8 gets too good at optimizing things, or memory usage can become a confounding factor.

Average Untracked 10 @ 200 :: 61.7 per iteration
Average Tracked 10 @ 200 :: 83.7 per iteration

If there are future regressions this would be a reasonable baseline.
The models here are simple to avoid overhead incurred by dependancies.

[averydev]

The evented mixin has been deprecated because of the performance hit taken by using hooks like ready() and pals. In addition, even when silenced, deprecations have a non-trivial performance impact.

Prior to this PR, those hooks were being set whether the model was being actively tracked or not, causing a significant performance hit, at least in Ember 3.14+.

This PR makes it so this overhead is no longer incurred on every single model regardless of its tracking status. It also reduces the deprecations to only those that are activated for tracking.

End result is that it appears that performance is significantly improved.