BUG: Fix GroupBy aggregate coersion of outputs inconsistency for pyarrow dtypes #24025

Job	Run time
Linux-32-bit	18m 37s
Linux-Musl	15m 29s
windows-latest actions-311.yaml	38m 19s
python-dev	0s
macos-14 actions-310.yaml	41m 5s
windows-latest actions-312.yaml	40m 15s
macos-14 actions-313.yaml	25m 38s
windows-latest actions-313.yaml	42m 30s
macos-13 actions-311.yaml	26m 25s
macos-14 actions-311.yaml	15m 53s
macos-13 actions-310.yaml	36m 53s
macos-13 actions-312.yaml	38m 49s
macos-13 actions-313.yaml	38m 24s
macos-14 actions-312.yaml	24m 45s
windows-latest actions-310.yaml	37m 39s
Pyodide build	23m 29s
Downstream Compat	5m 26s
Minimum Versions	23m 15s
Pyarrow Nightly	21m 12s
Future infer strings	45m 26s
ubuntu-24.04 actions-310.yaml	49m 6s
Future infer strings (without pyarrow)	38m 45s
Locale: it_IT	23m 48s
ubuntu-24.04 actions-312.yaml	43m 27s
ubuntu-24.04 actions-311.yaml	41m 46s
Pypy	1m 26s
ubuntu-24.04-arm actions-310.yaml	35m 26s
ubuntu-24.04-arm actions-313.yaml	36m 23s
Numpy Dev	17m 21s
Freethreading	21m 51s
ubuntu-24.04 actions-313.yaml	48m 24s
ubuntu-24.04-arm actions-311.yaml	37m 4s
ubuntu-24.04-arm actions-312.yaml	35m 59s
Locale: zh_CN	23m 31s
	16h 53m 46s

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