Further spec compliance

[crowlKats]

• [x] introduce the DEPTH_CLIP_CONTROL feature (edit: #2171)
• [x] introduce the INDIRECT_FIRST_INSTANCE feature (edit: #2206)
• [x] implement GPUCommandEncoder::fillBuffer
• [x] GPURenderPassDescriptor::colorAttachments is now a list of optional elements (edit: #2778)
• [x] GPURenderPassLayout::colorFormats is now a list of optional elements (edit: #2778)
• [x] GPUFragmentState::targets is now a list of optional elements (edit: #2778)
• [x] GPUPipelineDescriptorBase::layout now accepts an enum as well as the GPUPipelineLayout (#2895)
• [x] remove GPURenderPassEncoder::writeTimestamp and GPUComputePassEncoder::writeTimestamp in favour of Descriptor properties
• [x] GPURenderPassEncoder::beginOcclusionQuery missing
• [x] GPURenderPassEncoder::endOcclusionQuery missing
• [x] GPURenderPassDescriptor::occlusionQuerySet missing
• [x] GPUTextureDescriptor::viewFormats missing (#3237)
• [ ] GPURenderPassDescriptor::maxDrawCount missing
• [ ] GPURenderBundleEncoder::drawIndexedIndirect missing
• [ ] GPUShaderModuleDescriptor::compilationHints missing
• [ ] GPUShaderModule::getCompilationInfo missing
• [ ] GPURenderPassColorAttachment::depthSlice missing
• [ ] AdapterInfo::architecture missing
• [ ] GPUDeviceDescriptor::defaultQueue missing: https://github.com/gfx-rs/wgpu/issues/4014
• [ ] GPUMipmapFilterMode missing
• [ ] GPUDepthStencilState::depthWriteEnabled should be optional
• [ ] GPUDepthStencilState::depthCompare should be optional
• [ ] setBindGroup's bindGroup argument should be optional
• [ ] setVertexBuffer's buffer argument should be optional
• [x] limit maxBindingsPerBindGroup missing (https://github.com/gfx-rs/wgpu/pull/2957)
• [x] limit maxColorAttachments missing (https://github.com/gfx-rs/wgpu/pull/5218)
• [x] limit maxColorAttachmentBytesPerSample missing (https://github.com/gfx-rs/wgpu/pull/5218)
• [ ] limit maxBindGroupsPlusVertexBuffers missing
• [ ] limit maxInterStageShaderVariables missing
• [x] feature rg11b10ufloat-renderable missing (https://github.com/gfx-rs/wgpu/pull/3701)
• [x] feature bgra8unorm-storage missing (https://github.com/gfx-rs/wgpu/pull/4228)
• [x] feature float32-filterable missing (https://github.com/gfx-rs/wgpu/pull/4759)
• [ ] implement WGSLLanguageFeatures
• [x] TextureFormat rgb10a2uint missing (https://github.com/gfx-rs/wgpu/pull/4199)
• [x] VertexFormat unorm10-10-10-2 missing (https://github.com/gfx-rs/wgpu/pull/5477)

JS Only:

• [x] js-only: implement GPUPipelineError
• [x] js-only: implement GPUInternalError

[PJB3005]

3701 added RG11B10UFLOAT_RENDERABLE, so that can be ticked off.