Auto merge of #27402 - kunalmohan:webgpu-cts, r=jdm

Add a copy of WebGPU CTS to wpt.

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The test suite is generated from `glsl-dependent` branch in https://github.com/gpuweb/cts
We already have 6/44 tests passing and a number of subtests in other tests also pass.

r?@jdm
cc @kvark

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- [X] `./mach build -d` does not report any errors
- [X] `./mach test-tidy` does not report any errors
- [X] These changes fix #27395  (GitHub issue number if applicable)

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- [X] These changes do not require tests because we don't have tests for tests.

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