FIX Allow OrdinalEncoder's encoded_missing_value set to the cardinality#25704

jeremiedbb merged 2 commits intoscikit-learn:mainscikit-learn/scikit-learn:mainfrom

thomasjpfan:ordinal_encoder_bug_missingthomasjpfan/scikit-learn:ordinal_encoder_bug_missingCopy head branch name to clipboard