PCA benchmark: dpnp on CPU is 3 times slower than NumPy

[antonwolfy]

Results from dpbench of PCA workload (running on a laptop with 11th Gen processor and Iris Xe graphics):

workload	numpy	dpnp CPU	dpnp GPU	size
pca	1.2 s	3.6 s	1.2 s	1048576

demonstrates dpnp execution time on CPU which is 3 times greater than one of NumPy.

[antonwolfy]

The numbers with dpnp=0.12.0:

workload	numpy	dpnp CPU	dpnp GPU	size
pca	0.53 s	2.01 s	0.93 s	1048576

The result is faster, but still not in target.