TST: fix up for 32-bit indexers w.r.t. (GH8669)
Merge pull request #8675 from pydata/setitem

TST: fix up for 32-bit indexers w.r.t. (GH8669)
CLN: more generic index creation in algorithms.py

CLN: move coerce_indexer_dtype to common
PERF: set multiindex labels with coerced dtype (GH8456)