[backport 2.3.x] TST (string dtype): un-xfail string tests specific to object dtype (#59433) #21056

Job	Run time
Linux-32-bit	19m 50s
Linux-Musl	22m 39s
python-dev (macOS-13)	27m 18s
python-dev (macOS-14)	15m 1s
python-dev (ubuntu-22.04)	24m 6s
python-dev (windows-latest)	26m 46s
macos-13 actions-310.yaml	45m 28s
macos-13 actions-311.yaml	51m 47s
macos-13 actions-312.yaml	43m 5s
macos-13 actions-39.yaml	1h 6m 39s
macos-14 actions-310.yaml	32m 48s
macos-14 actions-311.yaml	32m 28s
macos-14 actions-39.yaml	39m 42s
macos-14 actions-312.yaml	28m 38s
windows-latest actions-311.yaml	41m 49s
windows-latest actions-312.yaml	44m 47s
windows-latest actions-310.yaml	39m 56s
windows-latest actions-39.yaml	38m 33s
ubuntu-latest actions-310.yaml	56m 30s
Copy-on-Write 3.10 (warnings)	28m 16s
Copy-on-Write 3.10	28m 10s
ubuntu-latest actions-311.yaml	50m 3s
Future infer strings (without pyarrow)	48m 16s
Locale: zh_CN	27m 26s
Copy-on-Write 3.11	28m 16s
Copy-on-Write 3.11 (warnings)	27m 30s
Locale: it_IT	27m 21s
Downstream Compat	5m 49s
Numpy Dev	22m 22s
Pyarrow Nightly	24m 31s
ubuntu-latest actions-312.yaml	38m 20s
Future infer strings	39m 19s
Copy-on-Write 3.12	31m 7s
ubuntu-latest actions-39.yaml	49m 7s
Copy-on-Write 3.9 (warnings)	27m 45s
Copy-on-Write 3.9	30m 14s
Minimum Versions	28m 14s
Pypy	7m 48s
	21h 7m 44s

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