TSL: Add AA-samples parameter to reflector-node

[NoxDawnsong]

Description

The default render-target for the reflector-node had no option to set anti-aliasing samples. For reflectors covering a large range, this can lead to unwanted flickering on distant and/or small objects, especially when using further processing on the reflector such as simulating roughness via blurring.

This PR adds a sample-parameter to the reflector to mitigate this.

As the constructor-signature of this node changed, the Typescript-definition package probably would need an update as well.

[github-actions]

📦 Bundle size

Full ESM build, minified and gzipped.

	Before	After	Diff
WebGL	338.84 79.07	338.84 79.07	+0 B +0 B
WebGPU	566.16 156.5	566.21 156.52	+48 B +16 B
WebGPU Nodes	564.77 156.26	564.81 156.28	+48 B +16 B

🌳 Bundle size after tree-shaking

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

	Before	After	Diff
WebGL	470.26 113.77	470.26 113.77	+0 B +0 B
WebGPU	637.36 172.49	637.36 172.49	+0 B +0 B
WebGPU Nodes	592.01 161.73	592.01 161.73	+0 B +0 B

[NoxDawnsong]

Requires #31544 in order to avoid blank RT when specifying both MSAA and mipmaps.