Ensure animations do not overshoot their final keyframe

[alice-i-cecile]

Objective

• Animations can overshoot their last keyframe.
• Fixes Last keyframe of animation curve not sampled #10832

Solution

• If the animation exceeds the final keyframe, clamp to the final value.

Additional context

This is an adoption of #10842 by @A-Walrus <3

[alice-i-cecile]

Closing this out: I need to clean up the related code first so I can understand what's going on with confidence.