BUG: Fix GroupBy aggregate coersion of outputs inconsistency for pyarrow dtypes #24048

Job	Run time
Linux-32-bit	18m 42s
Linux-Musl	15m 18s
Pyodide build	23m 18s
python-dev	0s
macos-13 actions-311.yaml	35m 37s
macos-13 actions-312.yaml	43m 38s
windows-latest actions-310.yaml	34m 41s
macos-13 actions-313.yaml	39m 12s
windows-latest actions-313.yaml	42m 26s
macos-14 actions-310.yaml	22m 44s
macos-14 actions-311.yaml	21m 3s
windows-latest actions-312.yaml	36m 33s
macos-13 actions-310.yaml	43m 43s
macos-14 actions-312.yaml	27m 17s
windows-latest actions-311.yaml	35m 37s
macos-14 actions-313.yaml	21m 18s
ubuntu-24.04-arm actions-312.yaml	37m 0s
ubuntu-24.04-arm actions-311.yaml	35m 24s
ubuntu-24.04-arm actions-310.yaml	38m 5s
ubuntu-24.04 actions-312.yaml	43m 32s
Future infer strings	44m 28s
ubuntu-24.04 actions-310.yaml	45m 52s
ubuntu-24.04-arm actions-313.yaml	35m 36s
Pypy	1m 15s
Numpy Dev	17m 17s
Future infer strings (without pyarrow)	39m 44s
Pyarrow Nightly	20m 23s
Minimum Versions	22m 56s
ubuntu-24.04 actions-313.yaml	48m 35s
Locale: zh_CN	23m 34s
Locale: it_IT	23m 21s
ubuntu-24.04 actions-311.yaml	42m 37s
Freethreading	21m 40s
Downstream Compat	5m 10s
	16h 47m 36s

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