BUG: Raise MergeError when suffixes result in duplicate column names … #23252

Job	Run time
Linux-32-bit	5m 6s
python-dev	-1s
Linux-Musl	5m 0s
python-freethreading	5m 13s
windows-latest actions-310.yaml	4m 57s
windows-latest actions-311.yaml	4m 57s
windows-latest actions-312.yaml	4m 58s
macos-13 actions-310.yaml	5m 5s
macos-13 actions-312.yaml	5m 23s
windows-latest actions-313.yaml	5m 6s
macos-13 actions-311.yaml	5m 17s
macos-13 actions-313.yaml	5m 15s
macos-14 actions-310.yaml	5m 18s
macos-14 actions-311.yaml	5m 17s
macos-14 actions-312.yaml	5m 16s
macos-14 actions-313.yaml	5m 16s
Pyodide build	5m 13s
ubuntu-22.04 actions-313.yaml	9m 58s
ubuntu-24.04-arm actions-312.yaml	9m 57s
Pypy	1m 16s
Locale: it_IT	5m 12s
ubuntu-24.04-arm actions-310.yaml	5m 4s
Locale: zh_CN	5m 13s
Downstream Compat	5m 13s
ubuntu-24.04-arm actions-311.yaml	9m 58s
Numpy Dev	5m 13s
ubuntu-24.04-arm actions-313.yaml	9m 58s
Future infer strings	5m 10s
Pyarrow Nightly	5m 14s
Future infer strings (without pyarrow)	9m 59s
Minimum Versions	5m 15s
ubuntu-22.04 actions-310.yaml	9m 57s
ubuntu-22.04 actions-311.yaml	9m 59s
ubuntu-22.04 actions-312.yaml	5m 11s
	3h 20m 23s

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