[WebGPU] Deprecate setting depth bias for lines and points

[chrisdavidmills]

See https://developer.chrome.com/blog/new-in-webgpu-128#deprecate_setting_depth_bias_for_lines_and_points for change description.

Acceptance criteria

• Update the validation error information on https://developer.mozilla.org/en-US/docs/Web/API/GPUDevice/createRenderPipeline to describe this validation error circumstance.
• Update the descriptions of depthBias, depthBiasSlopeScale, and depthBiasClamp on https://developer.mozilla.org/en-US/docs/Web/API/GPUDevice/createRenderPipeline to say that they should be set to 0 when the topology for a render pipeline is a line or point type.
• Add a BCD data point for this change — it was shipped in Chrome 128.

[chrisdavidmills]

BCD update: mdn/browser-compat-data#24811

[chrisdavidmills]

Content update: #36482