WebGPU: Set multiple parameters in RenderPipelineDesc. This change adds multiple setters to RenderPipelineDesc to set various parameters within the DepthStencilState. Bug: angleproject:42267012 Change-Id: I71eed7195477572295de6575bfa18d2c58ca93de Reviewed-on: https://chromium-review.googlesource.com/c/angle/angle/+/5765553 Reviewed-by: Matthew Denton <mpdenton@chromium.org> Commit-Queue: Liza Burakova <liza@chromium.org>