TST (string dtype): resolve xfails for frame methods #20448

Job	Run time
Pyodide build	5m 58s
Linux-32-bit	5m 46s
Linux-Musl	5m 46s
python-dev (macOS-13)	6m 0s
python-dev (macOS-14)	6m 1s
python-dev (ubuntu-22.04)	5m 57s
python-dev (windows-latest)	5m 48s
python-freethreading	6m 4s
macos-13 actions-310.yaml	5m 49s
macos-13 actions-311.yaml	5m 47s
macos-13 actions-312.yaml	5m 47s
macos-14 actions-310.yaml	8m 13s
macos-14 actions-311.yaml	6m 2s
macos-14 actions-312.yaml	6m 13s
windows-latest actions-311.yaml	5m 45s
windows-latest actions-312.yaml	5m 42s
windows-latest actions-310.yaml	5m 46s
ubuntu-latest actions-310.yaml	5m 47s
Minimum Versions	6m 7s
ubuntu-latest actions-311.yaml	5m 46s
Future infer strings (without pyarrow)	5m 47s
Locale: zh_CN	5m 45s
Locale: it_IT	5m 47s
Downstream Compat	6m 2s
Numpy Dev	6m 4s
ubuntu-latest actions-312.yaml	5m 46s
Pyarrow Nightly	6m 0s
Future infer strings	5m 46s
Pypy	3m 50s
	2h 50m 51s

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