benchdnn: inputs: graph: add sdpa regression tests

Author: TaoLv

tests/benchdnn/inputs/graph/complex_fusion/harness_mha_all

@@ -113,3 +113,6 @@
 # d_qk != d_v
 --reset --dt=f32,bf16,f16 --in-shapes=8:1x16x384x32,8:1x16x384x64,8:1x16x384x128 --case=complex_fusion/mha/sdpa-plain-simplified-f16.json
 --reset --dt=f32,bf16,f16 --in-shapes=11:1x16x384x32,11:1x16x384x64,11:1x16x384x128 --case=complex_fusion/mha/sdpa-plain-implicit-causal-mask-fp32-bs1.json
+
+# regression tests
+--reset --dt=f32,bf16,f16 --in-shapes=0:1x8x4096x16+1:1x8x5x16+5:1x1x4096x5+8:1x8x5x16 --case=complex_fusion/mha/sdpa-plain-simplified-f16.json