BUG: Preserve timezone in numpy_dtype for ArrowDtype #20927

Job	Run time
Linux-32-bit	4m 31s
Linux-Musl	4m 31s
python-dev (macOS-13)	4m 49s
python-dev (macOS-14)	2m 15s
python-dev (ubuntu-22.04)	4m 12s
python-dev (windows-latest)	4m 37s
Pyodide build	4m 18s
macos-13 actions-310.yaml	4m 54s
macos-13 actions-311.yaml	4m 43s
macos-14 actions-310.yaml	2m 21s
macos-13 actions-312.yaml	4m 53s
macos-14 actions-311.yaml	2m 35s
windows-latest actions-311.yaml	4m 44s
macos-14 actions-312.yaml	2m 24s
windows-latest actions-312.yaml	4m 27s
windows-latest actions-310.yaml	4m 27s
python-freethreading	4m 47s
ubuntu-latest actions-310.yaml	4m 44s
Minimum Versions	4m 43s
ubuntu-latest actions-311.yaml	4m 42s
Future infer strings (without pyarrow)	4m 48s
Locale: zh_CN	4m 43s
Locale: it_IT	4m 44s
Downstream Compat	4m 45s
Numpy Dev	4m 30s
ubuntu-latest actions-312.yaml	4m 44s
Future infer strings	4m 42s
Pyarrow Nightly	4m 30s
Pypy	1m 18s
	2h 2m 21s

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