Llama: always convert the causal mask in the SDPA code path #29663
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What does this PR do?
Removes the
ifcondition to apply the used-definedattention_maskoncausal_mask: it is not required for correctness, and it prevents correct left-padding behavior in compile mode (related PR: #29374).I could not observe any performance degradation with eager dynamic cache nor with compiled static cache 🙌