Replace MovieLens loaders with load_movielens function #460

Job	Run time
Conda Python 3.10 on ubuntu-latest	6m 22s
Conda Python 3.10 on macos-latest	4m 34s
Conda Python 3.10 on windows-latest	12m 30s
FunkSVD tests on Python 3.10	47s
Conda Python 3.11 on ubuntu-latest	6m 32s
FunkSVD tests on Python 3.11	35s
Conda Python 3.11 on macos-latest	4m 51s
FunkSVD tests on Python 3.12	40s
Conda Python 3.11 on windows-latest	13m 52s
Conda Python 3.12 on ubuntu-latest	6m 21s
Minimal dependency tests for FunkSVD	36s
Conda Python 3.12 on macos-latest	4m 48s
Conda Python 3.12 on windows-latest	10m 45s
Implicit bridge tests on Python 3.10	43s
Minimal dependency tests	5m 11s
Implicit bridge tests on Python 3.11	1m 7s
Non-JIT test coverage	4m 52s
Implicit bridge tests on Python 3.12	43s
Vanilla Python 3.10 on ubuntu-latest	5m 53s
Vanilla Python 3.10 on macos-latest	3m 5s
Demos, examples, and docs	1m 6s
Vanilla Python 3.11 on ubuntu-latest	6m 41s
Evaluation-based tests	12m 0s
Vanilla Python 3.11 on macos-latest	3m 8s
HPF bridge tests on Python 3.10	53s
Vanilla Python 3.12 on ubuntu-latest	7m 43s
Minimal dependency tests for Implicit	31s
Vanilla Python 3.12 on macos-latest	4m 12s
HPF bridge tests on Python 3.11	55s
HPF bridge tests on Python 3.12	54s
Test suite results	1s
	2h 12m 51s

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