Deprecate .T property on non-2D dpnp.ndarray

[vlad-perevezentsev]

This PR suggests raising DeprecationWarning for .T property on dpnp.ndarray other than 2D and in a future release will raise an error according to the Python Array API

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[github-actions]

Array API standard conformance tests for dpnp=0.20.0dev1=py313h509198e_15 ran successfully.
Passed: 1229
Failed: 0
Skipped: 7

[coveralls]

coverage: 81.452% (+0.002%) from 81.45%
when pulling a23719b on depr_T_non_2dim
into 75b13c5 on master.

[github-actions]

View rendered docs @ https://intelpython.github.io/dpnp/pull/2681/index.html

[antonwolfy]

Thank you @vlad-perevezentsev
LGTM with a small nit