PERF: avoid object-dtype path in ArrowEA._explode #24332

Job	Run time
python-dev	0s
Pyodide build	23m 18s
Linux-32-bit	18m 41s
Linux-Musl	15m 32s
macos-13 actions-311.yaml	41m 11s
macos-14 actions-310.yaml	27m 42s
macos-13 actions-312.yaml	48m 8s
macos-14 actions-312.yaml	16m 5s
macos-14 actions-313.yaml	21m 54s
windows-latest actions-310.yaml	36m 18s
windows-latest actions-311.yaml	34m 29s
macos-13 actions-310.yaml	28m 28s
macos-13 actions-313.yaml	48m 3s
macos-14 actions-311.yaml	31m 46s
windows-latest actions-312.yaml	35m 12s
windows-latest actions-313.yaml	42m 44s
Future infer strings	44m 27s
Pypy	1m 17s
Downstream Compat	5m 19s
Locale: it_IT	24m 0s
Locale: zh_CN	23m 20s
ubuntu-24.04 actions-312.yaml	43m 35s
Freethreading	20m 53s
ubuntu-24.04-arm actions-310.yaml	37m 54s
ubuntu-24.04 actions-313.yaml	50m 23s
ubuntu-24.04-arm actions-311.yaml	35m 19s
ubuntu-24.04-arm actions-312.yaml	35m 36s
ubuntu-24.04-arm actions-313.yaml	35m 23s
Numpy Dev	16m 54s
Future infer strings (without pyarrow)	39m 28s
Pyarrow Nightly	21m 1s
ubuntu-24.04 actions-311.yaml	43m 35s
ubuntu-24.04 actions-310.yaml	46m 52s
Minimum Versions	23m 9s
	16h 57m 56s

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