Add a copy for strided arrays in dpnp.dot()

[antonwolfy]

The PR proposes to add an additional step with creating a contiguous copy of input array if it wasn't placed in contiguous memory. This has to provide better performance for the use case, since OneMKL function dot will be used.
Additionally, the PR is assumed to be introduced together with #1389, where excess copy is removed during transposing of an array.

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