TST: update expected dtype for sum of decimals with pyarrow 21+ (#61799) #24324

Job	Run time
python-dev	0s
Linux-Musl	16m 19s
Linux-32-bit	18m 41s
windows-latest actions-313.yaml	44m 46s
macos-13 actions-312.yaml	39m 9s
macos-14 actions-310.yaml	32m 17s
macos-13 actions-311.yaml	55m 25s
macos-14 actions-313.yaml	21m 22s
macos-13 actions-313.yaml	42m 57s
macos-14 actions-312.yaml	20m 8s
macos-14 actions-311.yaml	26m 24s
windows-latest actions-312.yaml	34m 40s
windows-latest actions-310.yaml	34m 37s
windows-latest actions-311.yaml	36m 22s
Numpy Dev	17m 3s
macos-13 actions-310.yaml	34m 13s
Downstream Compat	5m 45s
Pyodide build	23m 46s
ubuntu-24.04-arm actions-310.yaml	36m 38s
Locale: it_IT	24m 14s
ubuntu-24.04-arm actions-311.yaml	34m 48s
ubuntu-24.04 actions-312.yaml	49m 14s
ubuntu-24.04-arm actions-313.yaml	38m 3s
ubuntu-24.04-arm actions-312.yaml	35m 41s
Future infer strings (without pyarrow)	38m 14s
Minimum Versions	23m 15s
ubuntu-24.04 actions-311.yaml	43m 2s
ubuntu-24.04 actions-310.yaml	46m 36s
Pypy	1m 29s
Future infer strings	44m 55s
Locale: zh_CN	24m 28s
ubuntu-24.04 actions-313.yaml	47m 55s
Pyarrow Nightly	20m 33s
Freethreading	21m 9s
	17h 14m 8s

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