onnxruntime

7aafd862 - Update Attention operator to support separated Q/K/V inputs (#13410)

Update Attention operator to support separated Q/K/V inputs (#13410) ### Description Allow separated Q, K and V inputs to support cross attention: * Q: [batch_size, sequence_length, hidden_size] * K: [batch_size, kv_sequence_length, hidden_size] * V: [batch_size, kv_sequence_length, v_hidden_size] * Output: [batch_size, sequence_length, v_hidden_size] To use separated Q/K/V inputs, the input tensor is for query, and two optional inputs are added for key and value. Weights for input projection is not included for now, so the MatMul of input projection shall be done out of Attention operator, but Add bias is included for performance consideration.