ENH: Add dtype argument to str.decode #21998

Job	Run time
Linux-32-bit	20s
Linux-Musl	18s
python-freethreading	8s
macos-13 actions-311.yaml	20s
macos-13 actions-312.yaml	19s
macos-13 actions-310.yaml	18s
macos-14 actions-310.yaml	20s
macos-14 actions-311.yaml	20s
macos-14 actions-312.yaml	18s
windows-latest actions-311.yaml	18s
windows-latest actions-312.yaml	14s
windows-latest actions-310.yaml	15s
python-dev (macOS-13)	1s
python-dev (ubuntu-22.04)	7s
python-dev (macOS-14)	5s
python-dev (windows-latest)	1s
Pyodide build	18s
Minimum Versions	6s
Future infer strings (without pyarrow)	16s
Locale: zh_CN	15s
Downstream Compat	1s
Locale: it_IT	18s
Numpy Dev	5s
Pyarrow Nightly	5s
Future infer strings	4s
Pypy	24s
ubuntu-22.04 actions-310.yaml	7s
ubuntu-22.04 actions-311.yaml	17s
ubuntu-22.04 actions-312.yaml	2s
ubuntu-24.04-arm actions-311.yaml	5s
ubuntu-24.04-arm actions-312.yaml	1s
ubuntu-24.04-arm actions-310.yaml	4s
	6m 10s

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