BUG: Preserve timezone in numpy_dtype for ArrowDtype #20935

Job	Run time
Linux-32-bit	12m 7s
Linux-Musl	12m 4s
python-freethreading	12m 6s
Pyodide build	12m 2s
python-dev (macOS-14)	10m 24s
python-dev (macOS-13)	11m 56s
python-dev (ubuntu-22.04)	12m 6s
python-dev (windows-latest)	12m 3s
macos-13 actions-310.yaml	12m 3s
macos-13 actions-311.yaml	12m 5s
macos-13 actions-312.yaml	12m 3s
macos-14 actions-310.yaml	12m 5s
macos-14 actions-311.yaml	12m 2s
macos-14 actions-312.yaml	12m 7s
windows-latest actions-311.yaml	12m 2s
windows-latest actions-310.yaml	12m 2s
windows-latest actions-312.yaml	12m 2s
ubuntu-latest actions-310.yaml	12m 6s
Minimum Versions	12m 9s
ubuntu-latest actions-311.yaml	12m 5s
Future infer strings (without pyarrow)	12m 5s
Downstream Compat	5m 36s
Locale: it_IT	12m 6s
Locale: zh_CN	12m 5s
Numpy Dev	12m 4s
Pyarrow Nightly	12m 7s
ubuntu-latest actions-312.yaml	12m 4s
Pypy	1m 14s
Future infer strings	12m 5s
	5h 31m 5s

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