Add tests derived from VK-GL-CTS

This adds SPIR-V assembly and WGSL tests derived from VK-GL-CTS commit
571256871c2e2f03995373e1e4a02958d8cd8cf5. The following procedure was
followed:

- Those .amber files in VK-GL-CTS wholly owned by Google were
  identified

- All GLSL and SPIR-V shaders were extracted from the Amber files and
  converted into SPIR-V binaries

- The compact-ids pass of spirv-opt was applied to each binary

- Duplicate binaries were removed

- spirv-opt -O was used to obtain an optimized version of each remaining
  binary, with duplicates discarded

- Binaries that failed validation using spirv-val with target
  environment SPIR-V 1.3 were discarded

- Those binaries that tint could not successfully convert into WGSL were
  put aside for further investigation

- SPIR-V assembly versions of the remaining binaries are included in
  this CL

- test-runner with -generate-expected and -generate-skip was used to
  generate expected .spvasm, .msl, .hlsl and .wgsl outputs for these
  SPIR-V assembly tests

- Each successfully-generated .expected.wgsl is included in this CL
  again, as a WGLSL test

- test-runner with -generate-expected and -generate-skip was used again,
  to generate expected outputs for these WGSL tests

Change-Id: Ibe9baf2729cf97e0b633db9a426f53362a5de540
Reviewed-on: https://dawn-review.googlesource.com/c/tint/+/58842
Kokoro: Kokoro <noreply+kokoro@google.com>
Commit-Queue: Ben Clayton <bclayton@google.com>
Reviewed-by: Ben Clayton <bclayton@google.com>

test/vk-gl-cts/graphicsfuzz/cov-condition-loop-index-bitwise-not/0-opt.spvasm

@@ -0,0 +1,109 @@
+               OpCapability Shader
+          %1 = OpExtInstImport "GLSL.std.450"
+               OpMemoryModel Logical GLSL450
+               OpEntryPoint Fragment %main "main" %_GLF_color
+               OpExecutionMode %main OriginUpperLeft
+               OpSource ESSL 320
+               OpName %main "main"
+               OpName %a "a"
+               OpName %buf0 "buf0"
+               OpMemberName %buf0 0 "_GLF_uniform_int_values"
+               OpName %_ ""
+               OpName %i "i"
+               OpName %_GLF_color "_GLF_color"
+               OpDecorate %_arr_int_uint_3 ArrayStride 16
+               OpMemberDecorate %buf0 0 Offset 0
+               OpDecorate %buf0 Block
+               OpDecorate %_ DescriptorSet 0
+               OpDecorate %_ Binding 0
+               OpDecorate %_GLF_color Location 0
+       %void = OpTypeVoid
+         %10 = OpTypeFunction %void
+        %int = OpTypeInt 32 1
+%_ptr_Function_int = OpTypePointer Function %int
+       %uint = OpTypeInt 32 0
+     %uint_3 = OpConstant %uint 3
+%_arr_int_uint_3 = OpTypeArray %int %uint_3
+       %buf0 = OpTypeStruct %_arr_int_uint_3
+%_ptr_Uniform_buf0 = OpTypePointer Uniform %buf0
+          %_ = OpVariable %_ptr_Uniform_buf0 Uniform
+      %int_0 = OpConstant %int 0
+      %int_1 = OpConstant %int 1
+%_ptr_Uniform_int = OpTypePointer Uniform %int
+      %int_2 = OpConstant %int 2
+       %bool = OpTypeBool
+      %float = OpTypeFloat 32
+    %v4float = OpTypeVector %float 4
+%_ptr_Output_v4float = OpTypePointer Output %v4float
+ %_GLF_color = OpVariable %_ptr_Output_v4float Output
+       %main = OpFunction %void None %10
+         %24 = OpLabel
+          %a = OpVariable %_ptr_Function_int Function
+          %i = OpVariable %_ptr_Function_int Function
+         %25 = OpAccessChain %_ptr_Uniform_int %_ %int_0 %int_1
+         %26 = OpLoad %int %25
+               OpStore %a %26
+         %27 = OpAccessChain %_ptr_Uniform_int %_ %int_0 %int_1
+         %28 = OpLoad %int %27
+               OpStore %i %28
+               OpBranch %29
+         %29 = OpLabel
+               OpLoopMerge %30 %31 None
+               OpBranch %32
+         %32 = OpLabel
+         %33 = OpLoad %int %i
+         %34 = OpAccessChain %_ptr_Uniform_int %_ %int_0 %int_2
+         %35 = OpLoad %int %34
+         %36 = OpSLessThan %bool %33 %35
+               OpBranchConditional %36 %37 %30
+         %37 = OpLabel
+         %38 = OpLoad %int %i
+         %39 = OpNot %int %38
+         %40 = OpINotEqual %bool %39 %int_0
+               OpSelectionMerge %41 None
+               OpBranchConditional %40 %42 %41
+         %42 = OpLabel
+         %43 = OpLoad %int %a
+         %44 = OpIAdd %int %43 %int_1
+               OpStore %a %44
+               OpBranch %41
+         %41 = OpLabel
+               OpBranch %31
+         %31 = OpLabel
+         %45 = OpLoad %int %i
+         %46 = OpIAdd %int %45 %int_1
+               OpStore %i %46
+               OpBranch %29
+         %30 = OpLabel
+         %47 = OpLoad %int %a
+         %48 = OpAccessChain %_ptr_Uniform_int %_ %int_0 %int_2
+         %49 = OpLoad %int %48
+         %50 = OpIEqual %bool %47 %49
+               OpSelectionMerge %51 None
+               OpBranchConditional %50 %52 %53
+         %52 = OpLabel
+         %54 = OpAccessChain %_ptr_Uniform_int %_ %int_0 %int_0
+         %55 = OpLoad %int %54
+         %56 = OpConvertSToF %float %55
+         %57 = OpAccessChain %_ptr_Uniform_int %_ %int_0 %int_1
+         %58 = OpLoad %int %57
+         %59 = OpConvertSToF %float %58
+         %60 = OpAccessChain %_ptr_Uniform_int %_ %int_0 %int_1
+         %61 = OpLoad %int %60
+         %62 = OpConvertSToF %float %61
+         %63 = OpAccessChain %_ptr_Uniform_int %_ %int_0 %int_0
+         %64 = OpLoad %int %63
+         %65 = OpConvertSToF %float %64
+         %66 = OpCompositeConstruct %v4float %56 %59 %62 %65
+               OpStore %_GLF_color %66
+               OpBranch %51
+         %53 = OpLabel
+         %67 = OpAccessChain %_ptr_Uniform_int %_ %int_0 %int_1
+         %68 = OpLoad %int %67
+         %69 = OpConvertSToF %float %68
+         %70 = OpCompositeConstruct %v4float %69 %69 %69 %69
+               OpStore %_GLF_color %70
+               OpBranch %51
+         %51 = OpLabel
+               OpReturn
+               OpFunctionEnd