ciflow/trunk/199879: [MI450][Ads HIM Quick Test] Prefer hipBLASLt on gfx1250 (#199879)
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Summary: Pull Request resolved: #199879 Treat gfx1250 as a preferred and supported hipBLASLt architecture without requiring PyTorch to be compiled with ROCm 7.14 headers. This allows a newer TheRock runtime to provide gfx1250 support to a binary built against older headers. Keep the default backend change scoped to processes whose visible devices all match a hipBLASLt-preferred architecture; behavior for existing ar…
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