unify fusedl2nn with fuseddistanceNN, add deprecation warning for fus… #4146

Job	Run time
devcontainer / build (amd64, 12.0, conda)	21m 46s
devcontainer / build (amd64, 12.0, pip)	20m 18s
checks / other-checks	40s
checks / check-style	1m 20s
conda-cpp-build / compute-matrix	8s
wheel-build-pylibraft / compute-matrix	2s
wheel-build-pylibraft / 11.8.0, 3.9, amd64, centos7	18m 40s
wheel-build-pylibraft / 12.2.2, 3.9, amd64, centos7	18m 58s
wheel-build-pylibraft / 11.8.0, 3.10, amd64, centos7	18m 23s
wheel-build-pylibraft / 12.2.2, 3.10, amd64, centos7	18m 12s
wheel-build-pylibraft / 11.8.0, 3.9, arm64, rockylinux8	18m 6s
wheel-build-pylibraft / 12.2.2, 3.9, arm64, rockylinux8	20m 2s
wheel-build-pylibraft / 11.8.0, 3.10, arm64, rockylinux8	18m 5s
wheel-build-pylibraft / 12.2.2, 3.10, arm64, rockylinux8	20m 16s
conda-cpp-build / build (amd64, 3.10, 11.8.0, ubuntu22.04)	39m 4s
conda-cpp-build / build (amd64, 3.10, 12.2.2, ubuntu22.04)	29m 40s
conda-cpp-build / build (arm64, 3.10, 11.8.0, ubuntu22.04)	43m 41s
conda-cpp-build / build (arm64, 3.10, 12.2.2, ubuntu22.04)	33m 6s
wheel-tests-pylibraft / compute-matrix	3s
wheel-tests-pylibraft / 11.8.0, 3.9, amd64, ubuntu18.04, v100	11m 17s
wheel-tests-pylibraft / 12.2.2, 3.10, amd64, ubuntu20.04, v100	10m 44s
wheel-tests-pylibraft / 12.0.1, 3.10, arm64, ubuntu20.04, a100	6m 37s
conda-cpp-checks	0s
conda-cpp-tests	0s
conda-python-build	0s
docs-build	0s
conda-python-tests	0s
wheel-build-raft-dask	0s
wheel-tests-raft-dask	0s
pr-builder	0s
	6h 9m 8s

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