Replace MovieLens loaders with load_movielens function #456

Job	Run time
Demos, examples, and docs	1m 9s
Conda Python 3.10 on ubuntu-latest	41s
Conda Python 3.10 on macos-latest	51s
Evaluation-based tests	55s
Conda Python 3.10 on windows-latest	59s
FunkSVD tests on Python 3.10	37s
Minimal dependency tests for FunkSVD	29s
Conda Python 3.11 on ubuntu-latest	38s
FunkSVD tests on Python 3.11	37s
HPF bridge tests on Python 3.10	53s
Conda Python 3.11 on macos-latest	36s
FunkSVD tests on Python 3.12	43s
HPF bridge tests on Python 3.11	47s
Conda Python 3.11 on windows-latest	58s
Implicit bridge tests on Python 3.10	26s
HPF bridge tests on Python 3.12	39s
Conda Python 3.12 on ubuntu-latest	31s
Implicit bridge tests on Python 3.11	23s
Minimal dependency tests for Implicit	18s
Conda Python 3.12 on macos-latest	55s
Conda Python 3.12 on windows-latest	56s
Implicit bridge tests on Python 3.12	18s
Minimal dependency tests	22s
Non-JIT test coverage	14s
Vanilla Python 3.10 on ubuntu-latest	15s
Vanilla Python 3.10 on macos-latest	21s
Vanilla Python 3.11 on ubuntu-latest	1s
Vanilla Python 3.11 on macos-latest	8s
Vanilla Python 3.12 on ubuntu-latest	1s
Vanilla Python 3.12 on macos-latest	2s
Test suite results	1s
	16m 44s

Provide feedback