Implement python array API Inspection namespace

[antonwolfy]

The PR proposes to implement dpnp.__array_namespace_info__, what is a python array API Inspection namespace.
It is required to achieve the compliance with python array API.
The implementation leverages on appropriate namespace exposed by dpctl.tensor.

In addition, this PR makes an __array_api_version__ attribute available in dpnp. It also borrowed from dpctl.

The PR adds a dedication documentation page describing Array API standard compatibility, including reference on new dpnp.__array_namespace_info__.

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• Have you made sure that new changes do not introduce compiler warnings?
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[coveralls]

coverage: 71.302% (+0.005%) from 71.297%
when pulling edb2428 on impl-array_namespace_info
into b72f953 on master.

[antonwolfy]

Link to rendered documentation: https://intelpython.github.io/dpnp/pull/2275/reference/array_api.html

[github-actions]

Array API standard conformance tests for dpnp=0.17.0dev5=py312he4f9c94_10 ran successfully.
Passed: 966
Failed: 1
Skipped: 33

[vtavana]

Thank you, @antonwolfy!

[github-actions]

View rendered docs @ https://intelpython.github.io/dpnp/pull/2275/index.html

[github-actions]

Array API standard conformance tests for dpnp=0.17.0dev5=py312he4f9c94_17 ran successfully.
Passed: 966
Failed: 1
Skipped: 33