Renames multiple attachment clear values to match their new names in the
spec, deprecating the old ones.
- GPURenderPassColorAttachment.clearColor -> clearValue
- GPURenderPassDepthStencilAttachment.clearDepth -> depthClearValue
- GPURenderPassDepthStencilAttachment.clearStencil -> stencilClearValue
Additionally, the old names are marked as deprecated with appropriate
warnings if they are used during the deprecation period.
Bug: dawn:1269
Change-Id: I6649184d65578118942c1f51a41f350719665272
Reviewed-on: https://dawn-review.googlesource.com/c/dawn/+/80941
Reviewed-by: Shrek Shao <shrekshao@google.com>
Reviewed-by: Austin Eng <enga@chromium.org>
Commit-Queue: Brandon Jones <bajones@chromium.org>