Avoid PDL race conditions by disabling __restrict__ when PDL is used (llama/24030)

Avoid PDL race conditions by disabling __restrict__ when PDL is used (llama/24030)

* Removes __restrict__ from PDL kernel headers due to incompatibility with
PDL. Adds preprocessor directives based on arch in kernel body to add
__restrict__ to retain performance on older architectures.

* Simplifies new __restrict__ usage via macro

* Add hopper to PDL __restrict__ fix.

Co-authored-by: Oliver Simons <redacted>
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Co-authored-by: Oliver Simons <redacted>