TST: Simplify test_interp_string_axis and test_qcut_binning_issues #51747

Job	Run time
Docstring validation, typing, and other manual pre-commit hooks	15m 58s
ASV Benchmarks	19m 20s
Test install requirements-dev.txt	1m 42s
Build Docker Dev Environment	2m 25s
	39m 25s

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