GEODE-4189: Convert directly from utf-8 --> jmutf-8#942

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pdxcodemonkey:GEODE-4189-jmutf8

Commits on Mar 3, 2022

Commits on Mar 7, 2022

WIP: add some unit tests, and working on direct jmutf-8 --> UCS-4
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Commits on Mar 8, 2022

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