Request to add `py_unary_ufunc` and `py_binary_ufunc` functions to dpctl tensor headers

[antonwolfy]

The core part of functionality to add any elementwise function is quite similar between dpnp and dpctl. In scope of gh-1868 I proposed changes to dpnp code to add the same implementation per py_unary_ufunc and py_binary_ufunc functions from dpctl headers. And also updated exiting ufuncs from vm pybind11 extension to migrate and ti reuse these functions.

The issue is a request to expose py_unary_ufunc and py_binary_ufunc functions as part of dpctl tensor header if it's possible.