BUG: Raise MergeError when suffixes result in duplicate column names … #23480

Job	Run time
Linux-Musl	3m 30s
Linux-32-bit	3m 29s
Pyodide build	3m 43s
macos-14 actions-310.yaml	3m 48s
macos-14 actions-311.yaml	3m 46s
windows-latest actions-310.yaml	3m 28s
macos-14 actions-313.yaml	3m 46s
windows-latest actions-313.yaml	3m 27s
macos-13 actions-311.yaml	3m 34s
macos-13 actions-313.yaml	3m 53s
windows-latest actions-312.yaml	3m 38s
macos-13 actions-312.yaml	3m 52s
macos-14 actions-312.yaml	3m 45s
macos-13 actions-310.yaml	3m 50s
python-dev	-1s
windows-latest actions-311.yaml	3m 37s
Pyarrow Nightly	3m 46s
ubuntu-24.04-arm actions-310.yaml	3m 43s
Locale: it_IT	3m 45s
Minimum Versions	3m 45s
ubuntu-24.04-arm actions-311.yaml	3m 43s
Pypy	1m 20s
ubuntu-24.04 actions-311.yaml	3m 44s
Locale: zh_CN	3m 45s
Numpy Dev	3m 44s
ubuntu-24.04 actions-312.yaml	3m 44s
Future infer strings	3m 45s
Future infer strings (without pyarrow)	3m 46s
ubuntu-24.04-arm actions-313.yaml	3m 44s
ubuntu-24.04 actions-310.yaml	3m 45s
ubuntu-24.04-arm actions-312.yaml	3m 43s
Downstream Compat	3m 45s
Freethreading	3m 43s
ubuntu-24.04 actions-313.yaml	3m 45s
	2h 0m 0s

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