Vector: Replace MathUtils.clamp() with clamp()

[mrdoob]

Related issue: #29812

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	339.13 79	339.13 79	+0 B +0 B
WebGPU	478.72 132.72	478.72 132.72	+0 B +0 B
WebGPU Nodes	478.18 132.6	478.18 132.6	+0 B +0 B

🌳 Bundle size after tree-shaking

Minimal build including a renderer, camera, empty scene, and dependencies.

	Before	After	Diff
WebGL	464.59 111.96	464.59 111.96	+0 B +0 B
WebGPU	546.88 148.18	546.88 148.18	+0 B +0 B
WebGPU Nodes	502.76 137.89	502.76 137.89	+0 B +0 B

[linbingquan]

I have previously tested that using the MathUtils.* namespace in the three.js project has no effect on the tree shake.

Consistent with the robot report. Kind of counter-intuitive.

But referencing three.js in other projects, the MathUtils.* namespace has an effect on tree shaking.

[mrdoob]

Minifiers seem to be smart these days.