Disable shape scaling by default

[LeXXik]

We have it enabled by default currently:

engine/src/framework/physics/physics-world.js

Lines 184 to 195 in a223a89

	/**
	* Whether mesh shapes honour the per-instance {@link PhysicsMeshSource} scale, so that a
	* mesh shape is rebuilt when the world scale of its entity changes. Backends that cannot
	* scale mesh instances independently return false, and mesh shapes are then left alone when
	* their entity is rescaled.
	*
	* @type {boolean}
	* @ignore
	*/
	get supportsMeshScaling() {
	return true;
	}

This adds an extra loop every step to check if a component's entity was scaled. Which adds an overhead for projects that did not rely on that functionality previously. I think we should probably false it by default, unless a user needs to change scales at runtime - they can then enable it for some cost. This will affect projects that use hundreds of rigibodies.