graph, benchdnn: several minor fixes for SDPA with mask #1973

Job	Run time
build-acl-cache / MacOS, clang, SEQ, Release	14s
build-acl-cache / cb100, gcc, OMP, Release	14s
build-acl-cache / c6g, clang, OMP, Debug	14s
build-acl-cache / c6g, gcc, OMP, Release	11s
MacOS, clang, SEQ, Release	42m 10s
cb100, gcc, OMP, Release	18m 24s
c6g, gcc, OMP, Release	1h 8m 49s
c6g, clang, OMP, Debug	42m 38s
c7g, gcc, OMP, Release	42m 28s
CI AArch64	1s
	3h 35m 23s

Provide feedback