BUG: Fix get_level_values for boolean, NA-like, and integer index names #63514
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levelcorrectly #62169doc/source/whatsnew/v3.0.0.rstfile if fixing a bug or adding a new feature.AGENTS.md.Continues work from #62175 after the original author stepped back.
Index.get_level_values()was mishandling several edge cases:True/False) were treated as integersnp.nan,pd.NA,pd.NaT) failed equality comparisonThis PR fixes the validation logic to handle these cases correctly.