TST[string]: update expecteds for using_string_dtype to fix xfails #49465

Job	Run time
ASV Benchmarks	19m 39s
Build Docker Dev Environment	2m 44s
Test install requirements-dev.txt	1m 50s
Docstring validation, typing, and other manual pre-commit hooks	12m 15s
Docstring validation, typing, and other manual pre-commit hooks	10m 55s
Build Docker Dev Environment	2m 44s
Test install requirements-dev.txt	1m 50s
ASV Benchmarks	19m 39s
Docstring validation, typing, and other manual pre-commit hooks	11m 5s
Build Docker Dev Environment	2m 44s
Test install requirements-dev.txt	1m 50s
ASV Benchmarks	19m 39s
	1h 46m 54s

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