fix for #60695 fix Series constructor dropping key levels when keys have varying entry counts #21975

Job	Run time
Pyodide build	27m 20s
Linux-32-bit	18m 47s
Linux-Musl	16m 46s
python-freethreading	24m 1s
python-dev (macOS-13)	20m 41s
python-dev (macOS-14)	9m 39s
python-dev (ubuntu-22.04)	21m 34s
python-dev (windows-latest)	24m 15s
macos-13 actions-310.yaml	41m 50s
macos-13 actions-311.yaml	40m 7s
macos-13 actions-312.yaml	40m 11s
macos-14 actions-310.yaml	22m 46s
macos-14 actions-311.yaml	16m 55s
macos-14 actions-312.yaml	23m 9s
windows-latest actions-311.yaml	35m 21s
windows-latest actions-310.yaml	39m 37s
windows-latest actions-312.yaml	39m 37s
Minimum Versions	25m 12s
Future infer strings (without pyarrow)	39m 39s
Locale: zh_CN	25m 1s
Locale: it_IT	25m 4s
Downstream Compat	6m 2s
Numpy Dev	18m 49s
Pyarrow Nightly	21m 48s
Future infer strings	39m 37s
Pypy	1m 19s
ubuntu-22.04 actions-310.yaml	39m 37s
ubuntu-22.04 actions-311.yaml	39m 37s
ubuntu-22.04 actions-312.yaml	39m 38s
ubuntu-24.04-arm actions-311.yaml	39m 38s
ubuntu-24.04-arm actions-310.yaml	39m 38s
ubuntu-24.04-arm actions-312.yaml	39m 38s
	15h 2m 53s

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