ext test case (DeepLink-org#721)

* set flash-attention lib default path depends on python version.

* rms_norm

* rotary_emb

* apply_penalty

* destindex_copy_kv

* token_attention

* token_softmax_reducev

* context_attention

* start_loc start from not zero

* mha add GLOBAL_STATE

* multihead_attention_varlen


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Co-authored-by: gqw <994321849@qq.com>
Co-authored-by: Gong-air <77915156+Gong-air@users.noreply.github.com>
Co-authored-by: wey-code <1060314685@qq.com>

Author: 3 people