[CUDA][HIP][NATIVECPU][OPENCL] Fix atomic capability query return type

[callumfare]

Fix some implementations (CUDA, HIP, Native CPU) of the atomic capability device queries to use the correct return type rather than uint64_t. This was caught by the validation layer during the move to replace PI with UR.

Also remove redundant casts from the OpenCL adapter's implementation.

[PietroGhg]

Native CPU lgtm, thank you

[GeorgeWeb]

CUDA and HIP LGTM

[martygrant]

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[martygrant]

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[github-actions]

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