Resolve multisampled prepass textures

[beicause]

Objective

Fixes #22830, fixes #22831

Solution

DepthPrepass texture is changed to R32Float which is resolved with new ResolvePlugin in prepass_depth_resolve pass. Bonus: WebGPU doesn't support filterable depth textures, but float32-filterable is generally supported. WebGL2 should also support resolved depth prepass.

Multisampled NormalPrepass and MotionVectorPrepass textures are transient and are resolved during prepass.

Testing

shader_prepass example can toggle MSAA.
DLSS and solari are likely broken due to changed depth prepass texture format.

[beicause]

This slightly conflicts with #22555 and #22554 because we can use depth prepass on WebGL2.