Jittering and smearing on physics objects in motion, especially those held by the physics gun

[Jamsers]

This is due to the render framerate exceeding the physics tick framerate, leading to physics objects reporting inconsistent "stop 'n start" motion vectors to motion blur. The bigger the discrepancy between the render framerate and the physics tick framerate, the more prominent the issue becomes.

The fix is #92391, so now we're Waiting For Godot™️ 4.4