PERF: avoid object-dtype path in ArrowEA._explode #24271

Job	Run time
python-dev	0s
Linux-32-bit	18m 38s
Linux-Musl	15m 21s
Pyodide build	23m 53s
windows-latest actions-311.yaml	37m 6s
macos-13 actions-311.yaml	33m 13s
windows-latest actions-312.yaml	41m 31s
macos-14 actions-310.yaml	20m 50s
macos-13 actions-313.yaml	34m 32s
macos-14 actions-312.yaml	18m 51s
macos-14 actions-313.yaml	25m 32s
windows-latest actions-313.yaml	43m 12s
macos-13 actions-312.yaml	36m 58s
macos-13 actions-310.yaml	37m 8s
macos-14 actions-311.yaml	21m 28s
windows-latest actions-310.yaml	36m 8s
ubuntu-24.04-arm actions-312.yaml	35m 14s
ubuntu-24.04 actions-310.yaml	46m 26s
ubuntu-24.04-arm actions-313.yaml	34m 52s
ubuntu-24.04 actions-313.yaml	47m 31s
Future infer strings	45m 28s
Downstream Compat	6m 12s
Minimum Versions	23m 11s
Freethreading	21m 28s
Locale: zh_CN	23m 49s
Future infer strings (without pyarrow)	38m 50s
ubuntu-24.04-arm actions-311.yaml	34m 59s
Pypy	1m 54s
Pyarrow Nightly	20m 29s
Numpy Dev	17m 25s
ubuntu-24.04-arm actions-310.yaml	38m 21s
ubuntu-24.04 actions-311.yaml	42m 32s
Locale: it_IT	23m 41s
ubuntu-24.04 actions-312.yaml	43m 45s
	16h 30m 28s

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