fix(gles): Only use sampler2DShadow if comparison samplers are used #8301
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Description
When declaring a
texture_depth_2din a shader, naga always outputs the texture uniform as type sampler2DShadow. When only interested in depth values and not comparisons, this breaks. This PR only usessampler2DShadowwhen a comparison sampler is used for it. This is the only fix that I could come up with that only impacts the gles part.