ExtensionArray.Round method and tests #23940

Job	Run time
Linux-32-bit	18m 27s
Linux-Musl	15m 17s
python-dev	0s
Pyodide build	23m 23s
windows-latest actions-313.yaml	40m 52s
macos-13 actions-310.yaml	36m 36s
macos-13 actions-311.yaml	28m 26s
macos-14 actions-311.yaml	26m 0s
macos-14 actions-310.yaml	27m 17s
macos-14 actions-313.yaml	26m 45s
macos-13 actions-312.yaml	38m 39s
windows-latest actions-312.yaml	39m 3s
windows-latest actions-310.yaml	35m 4s
macos-13 actions-313.yaml	41m 22s
macos-14 actions-312.yaml	23m 6s
ubuntu-24.04-arm actions-310.yaml	36m 23s
Locale: zh_CN	24m 29s
windows-latest actions-311.yaml	37m 21s
Minimum Versions	24m 1s
ubuntu-24.04-arm actions-313.yaml	35m 40s
ubuntu-24.04 actions-311.yaml	43m 6s
Freethreading	21m 59s
ubuntu-24.04 actions-312.yaml	45m 10s
ubuntu-24.04-arm actions-312.yaml	36m 54s
ubuntu-24.04 actions-313.yaml	48m 32s
ubuntu-24.04 actions-310.yaml	47m 46s
Locale: it_IT	23m 39s
Downstream Compat	5m 15s
ubuntu-24.04-arm actions-311.yaml	35m 44s
Numpy Dev	16m 46s
Future infer strings	45m 29s
Pypy	1m 36s
Future infer strings (without pyarrow)	39m 25s
Pyarrow Nightly	20m 4s
	16h 49m 36s

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