chore: refactor onedal interaction with backend and policies #2168

83.55% (target 0.00%)

Attention: Patch coverage is 91.53226% with 63 lines in your changes missing coverage. Please review.

Files with missing lines	Patch %	Lines
onedal/neighbors/neighbors.py	87.27%	14 Missing ⚠️
onedal/linear_model/logistic_regression.py	66.66%	13 Missing ⚠️
sklearnex/_device_offload.py	64.86%	13 Missing ⚠️
onedal/_device_offload.py	89.18%	12 Missing ⚠️
onedal/__init__.py	85.71%	5 Missing ⚠️
sklearnex/linear_model/ridge.py	25.00%	3 Missing ⚠️
onedal/cluster/kmeans.py	97.72%	1 Missing ⚠️
onedal/ensemble/forest.py	98.18%	1 Missing ⚠️
onedal/svm/svm.py	98.48%	1 Missing ⚠️

Files with missing lines	Coverage Δ
onedal/basic_statistics/basic_statistics.py	`100.00% <100.00%> (ø)`
...l/basic_statistics/incremental_basic_statistics.py	`100.00% <100.00%> (ø)`
onedal/cluster/dbscan.py	`97.14% <100.00%> (-0.59%)`	⬇️
onedal/cluster/kmeans_init.py	`97.67% <100.00%> (+2.32%)`	⬆️
onedal/common/hyperparameters.py	`81.13% <100.00%> (ø)`
onedal/covariance/covariance.py	`97.36% <100.00%> (+0.22%)`	⬆️
onedal/covariance/incremental_covariance.py	`96.15% <100.00%> (+0.91%)`	⬆️
onedal/datatypes/_data_conversion.py	`87.50% <100.00%> (-0.74%)`	⬇️
onedal/decomposition/incremental_pca.py	`98.59% <100.00%> (+0.17%)`	⬆️
onedal/decomposition/pca.py	`98.18% <100.00%> (+0.06%)`	⬆️
... and 32 more