Extend ._tensor_impl with remaining functions used by dpnp

[vlad-perevezentsev]

This PR extends _tensor_impl in dpctl_ext.tensor with the remaining functions that are explicitly used in dpnp implementations (_take, _full_usm_ndarray, _zeros_usm_ndarray, _linspace_step, _triu) enabling a complete switch to dpctl_ext.tensor._tensor_impl instead of dpctl.tensor._tensor_impl

It also adds take(), put(), full(),tril() and triu() to dpctl_ext.tensor and updates the corresponding dpnp functions to use these implementations internally

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[github-actions]

View rendered docs @ https://intelpython.github.io/dpnp/pull/2758/index.html

[github-actions]

Array API standard conformance tests for dpnp=0.20.0dev2=py313h509198e_31 ran successfully.
Passed: 1353
Failed: 2
Skipped: 9