test(cts): add coverage for clip-distances feature

Author: ErichDonGubler

cts_runner/test.lst

@@ -55,6 +55,7 @@ webgpu:api,operation,vertex_state,correctness:setVertexBuffer_offset_and_attribu
 
 webgpu:api,validation,buffer,create:*
 webgpu:api,validation,buffer,destroy:*
+webgpu:api,validation,capability_checks,features,clip_distances:*
 webgpu:api,validation,capability_checks,limits,maxBindGroups:setBindGroup,*
 webgpu:api,validation,capability_checks,limits,maxBufferSize:*
 //FAIL: other `maxInterStageShaderVariables` cases w/ limitTest ∈ [underDefault, overMaximum]
@@ -316,7 +317,7 @@ webgpu:shader,execution,flow_control,return:*
 // Many other vertex_buffer_access subtests also passing, but there are too many to enumerate.
 // Fails on Metal in CI only, not when running locally.
 fails-if(metal) webgpu:shader,execution,robust_access_vertex:vertex_buffer_access:indexed=true;indirect=false;drawCallTestParameter="baseVertex";type="float32x4";additionalBuffers=4;partialLastNumber=false;offsetVertexBuffer=true
-
+webgpu:shader,execution,shader_io,vertex_builtins:outputs,clip_distances:*
 webgpu:shader,validation,const_assert,const_assert:*
 webgpu:shader,validation,decl,assignment_statement:*
 webgpu:shader,validation,decl,compound_statement:*