perf(pt): DPA4-family performance optimizations (#6001) #647

Job	Run time
Build C library (libtorch.\.so.;libc10.\.so.;libshm\.so.;libkineto\.so.;libbackend_with_com...	10m 17s
Test building from C library	1m 20s
Pass building c library	4s
	11m 41s

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