Throw exception in py_sort if inputs are not C-contiguous

[oleksandr-pavlyk]

This changes behavior of py_sort C++ function to throw py::value_error exception should either input array be not C-contiguous.

• Have you provided a meaningful PR description?
• Have you added a test, reproducer or referred to an issue with a reproducer?
• Have you tested your changes locally for CPU and GPU devices?
• Have you made sure that new changes do not introduce compiler warnings?
• Have you checked performance impact of proposed changes?
• Have you added documentation for your changes, if necessary?
• Have you added your changes to the changelog?
• If this PR is a work in progress, are you opening the PR as a draft?

[ndgrigorian]

While you are in there, this comment can be removed too, since this is not reduction nor a special case.

[oleksandr-pavlyk]

@ndgrigorian Done, and also applied the same change to argsort.cpp.

[github-actions]

Deleted rendered PR docs from intelpython.github.com/dpctl, latest should be updated shortly. 🤞

[github-actions]

Array API standard conformance tests for dpctl=0.19.0dev0=py310hdf72452_42 ran successfully.
Passed: 894
Failed: 1
Skipped: 119

[github-actions]

Array API standard conformance tests for dpctl=0.19.0dev0=py310hdf72452_43 ran successfully.
Passed: 894
Failed: 1
Skipped: 119

[coveralls]

coverage: 87.907%. remained the same
when pulling 85d5cb9 on py-sorting-correction
into 5fc8c95 on master.

[ndgrigorian]

Good change, LGTM!