BUG: Raise MergeError when suffixes result in duplicate column names … #23253

Job	Run time
Linux-32-bit	17m 7s
python-dev	0s
Linux-Musl	15m 45s
Pyodide build	23m 30s
python-freethreading	22m 14s
Future infer strings	43m 41s
ubuntu-22.04 actions-310.yaml	45m 37s
Locale: zh_CN	24m 18s
Pypy	1m 42s
ubuntu-24.04-arm actions-311.yaml	32m 50s
ubuntu-24.04-arm actions-312.yaml	33m 39s
ubuntu-24.04-arm actions-313.yaml	34m 30s
ubuntu-22.04 actions-313.yaml	46m 47s
ubuntu-22.04 actions-311.yaml	41m 11s
Locale: it_IT	25m 59s
ubuntu-24.04-arm actions-310.yaml	34m 59s
Pyarrow Nightly	20m 31s
Numpy Dev	16m 48s
Downstream Compat	6m 0s
Future infer strings (without pyarrow)	37m 20s
Minimum Versions	24m 27s
macos-14 actions-313.yaml	17m 35s
ubuntu-22.04 actions-312.yaml	43m 15s
windows-latest actions-312.yaml	37m 33s
macos-13 actions-312.yaml	32m 14s
windows-latest actions-310.yaml	35m 36s
windows-latest actions-313.yaml	43m 5s
windows-latest actions-311.yaml	37m 43s
macos-13 actions-313.yaml	32m 58s
macos-13 actions-311.yaml	28m 38s
macos-14 actions-312.yaml	15m 56s
macos-14 actions-311.yaml	16m 21s
macos-13 actions-310.yaml	27m 20s
macos-14 actions-310.yaml	16m 55s
	15h 34m 4s

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