BUG: fix combine_first reorders columns (#60791) #21654

Job	Run time
Pyodide build	25m 48s
Linux-32-bit	18m 51s
Linux-Musl	21m 27s
python-freethreading	22m 48s
python-dev (macOS-13)	23m 48s
python-dev (macOS-14)	11m 40s
python-dev (ubuntu-22.04)	20m 23s
python-dev (windows-latest)	23m 0s
macos-13 actions-310.yaml	46m 0s
macos-13 actions-311.yaml	47m 44s
macos-13 actions-312.yaml	53m 30s
macos-14 actions-310.yaml	24m 31s
macos-14 actions-311.yaml	21m 54s
macos-14 actions-312.yaml	23m 24s
windows-latest actions-311.yaml	41m 10s
windows-latest actions-312.yaml	49m 49s
windows-latest actions-310.yaml	42m 56s
Minimum Versions	24m 18s
Future infer strings (without pyarrow)	40m 29s
Locale: zh_CN	26m 14s
Locale: it_IT	25m 14s
Downstream Compat	6m 51s
Numpy Dev	17m 23s
Pyarrow Nightly	21m 3s
Future infer strings	51m 7s
Pypy	3m 47s
ubuntu-22.04 actions-310.yaml	49m 26s
ubuntu-22.04 actions-311.yaml	45m 26s
ubuntu-22.04 actions-312.yaml	49m 16s
ubuntu-24.04-arm actions-311.yaml	36m 48s
ubuntu-24.04-arm actions-310.yaml	35m 12s
ubuntu-24.04-arm actions-312.yaml	38m 44s
	16h 30m 1s

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