Support WrapperGPUArray
nd indexing by fusing vectorized
fallback.
#512
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A quick trial to extend JuliaLang/julia#52626.
It seems bad to overloading internal functions. But this looks like the simplest way.
I took a quick code search on juliahub, and the result looks quite clean. (I wish there's no ambiguity risk.)
@maleadt Since this PR fuses the current fallback. IIUC, your concern on various lower-level routines should be resolved?