Fix file path too long error

[greggman]

Running "run:write-out-wpt-cts-html-chunked2sec" (run) task
Error: Generated test variant would produce too-long -actual.txt filename. Possible solutions:
  - Reduce the length of the parts of the test query
  - Reduce the parameterization of the test - Make the test function faster and regenerate the listing_meta entry - Reduce the specificity of test expectations (if you're using them) |<------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------>| webgpu:compat,api,validation,pipeline_creation:depth_textures:sampleWGSL="textureGather(t,%20s,%20vec2f(0),%200,%20vec2i(0,%200))";textureType="texture_depth_2d_array";stage="fragment";* webgpu:compat,api,validation,pipeline_creation:depth_textures:sampleWGSL="textureGather(t,%20s,%20vec2f(0),%200,%20vec2i(0,%200))";textureType="texture_depth_2d_array";stage="compute";*

I'm curious how this passed submission. 🤷‍♂️