IntelPython / dpnp / 18286575851

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Resolve an issue with cyclic import in `linalg` submodule (#2608)

The PR reworks the import of `linalg` submodule to avoid a wildcard
import.

Also it resolves the issue reported by pylint:
> Cyclic import (dpnp.linalg -> dpnp.linalg.dpnp_iface_linalg ->
dpnp.linalg.dpnp_utils_linalg) (cyclic-import)

and moves `LinAlgError` exception to be exposed by LAPACK pybind11
extension, because it is created there.
While later the exception patched at python level to be set to
"dpnp.linalg" submodule explicitly.

Otherwise we have the import cycle like:
> linalg/__init__.py -> dpnp_iface_linalg.py -> dpnp_utils_linalg.py ->
linalg/__init__.py

which might cause the import failure.

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