Add ROCm 6.4.3+ support

[Looong01]

Because ROCm 6.4.3 implements stricter type checking in the HIP warp shuffle API, code that previously compiled in 6.4.2 now triggers a static_assert at compile time.

The error message reads:
static assertion failed due to requirement 'sizeof(unsigned int) == 8': The mask must be a 64-bit integer

This is because ROCm 6.4.3's __shfl_sync / __shfl_up_sync / __shfl_down_sync function templates now require the mask parameter to be a 64-bit integer (uint64_t), but your code is passing an unsigned int (32-bit), resulting in a compilation failure.

Reason for Change
In the HIP header file (amd_warp_sync_functions.h) of ROCm 6.4.3, AMD added the following:
static_assert(sizeof(MaskT) == 8, "The mask must be a 64-bit integer...");

This was added to unify the behavior and avoid potential errors caused by implicit type promotion.

[codecov-commenter]

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Codecov Report

✅ All modified and coverable lines are covered by tests.
✅ Project coverage is 98.20%. Comparing base (140d3ad) to head (9799c51).
⚠️ Report is 20 commits behind head on master.
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Additional details and impacted files

@@            Coverage Diff             @@
##           master     #498      +/-   ##
==========================================
+ Coverage   97.23%   98.20%   +0.97%     
==========================================
  Files          10       10              
  Lines         217      223       +6     
==========================================
+ Hits          211      219       +8     
+ Misses          6        4       -2     

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