Support more use cases for 'out' parameter

[antonwolfy]

The PR is about to improve handling of out parameter in supported dpnp functions.
It's required to consider use cases when

• out refers to the same array as any of input ones
• out with strides
• out where dtype is different from expected one

In both cases extra memory is allocated and it's need to copy the result back from temporary array into out array.

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[vlad-perevezentsev]

Good job!

This PR is not completed yet

[vlad-perevezentsev]

LGTM!