Extend ._tensor_impl with where(), clip() and type utils functions

[vlad-perevezentsev]

This PR extends _tensor_impl in dpctl_ext.tensor with the _where, _clip and repeat functions
(_repeat_by_sequence, _repeat_by_scalar)

It also adds repeat(), where(), clip() and can_cast, finfo, iinfo, isdtype, result_type from _type_utils.py `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/2778/index.html

[github-actions]

Array API standard conformance tests for dpnp=0.20.0dev3=py313h509198e_87 ran successfully.
Passed: 1356
Failed: 1
Skipped: 7