REGR: Fix IntervalArray.nunique with infinity (#63267) #51874

Job	Run time
Test Conda Forge Recipe	2m 44s
Install Extras - compression	6m 20s
Install Extras - computation	3m 53s
Install Extras - aws	3m 56s
Install Extras - clipboard	3m 44s
Install Extras - fss	3m 49s
Install Extras - gcp	3m 54s
Install Extras - all	4m 31s
Install Extras - feather	3m 44s
Install Extras - excel	3m 53s
Install Extras - performance	3m 56s
Install Extras - parquet	3m 49s
Install Extras - plot	4m 0s
Install Extras - sql-other	4m 14s
Install Extras - test	3m 51s
Install Extras - html	3m 52s
Install Extras - pyarrow	3m 42s
Install Extras - xml	3m 42s
Install Extras - hdf5	3m 42s
Install Extras - spss	3m 58s
Install Extras - output-formatting	3m 48s
Install Extras - mysql	3m 44s
Install Extras - postgresql	3m 59s
	1h 30m 45s

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