Fix bug in basic slicing of empty arrays

[oleksandr-pavlyk]

Reproducer provided by @ndgrigorian:

import dpctl.tensor as dpt
x = dpt.ones((0, 10))
y = dpt.moveaxis(x, 1, 0)
y[1] # raises ValueError

Now this returns empty 1d array like y[0] does.

A test is added for both integral basic indexing, and for simple slice.

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• [x] Have you added a test, reproducer or referred to an issue with a reproducer?
• [x] Have you tested your changes locally for CPU and GPU devices?
• [x] Have you made sure that new changes do not introduce compiler warnings?
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[github-actions[bot]]

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

[coveralls]

coverage: 87.953% (+0.005%) from 87.948% when pulling 9fa1aeccb93b14e7938a8ba25ef17c0aec657763 on fix-basic-slicing-on-empty-arrays into d840cee4a2bba21e076c9b1f124cff6271f6f2ac on master.

[github-actions[bot]]

Array API standard conformance tests for dpctl=0.17.0dev0=py310h15de555_353 ran successfully. Passed: 889 Failed: 16 Skipped: 91

[github-actions[bot]]

Array API standard conformance tests for dpctl=0.17.0dev0=py310h15de555_353 ran successfully. Passed: 889 Failed: 16 Skipped: 91