erp5_content_translation: move workflow chain definition to erp5_l10n_ja.

These workflows on Person are useful for Japanese usecase only where
we use content translation for 'furigana' (pronunciation).
7 jobs for master in 0 seconds (queued for 3 seconds)
Status Job ID Name Coverage
  External
failed ERP5.CodingStyleTest-Master

00:35:30

passed ERP5.PerformanceTest-Master

00:26:47

passed ERP5.UnitTest-Master

03:19:10

failed ERP5.UnitTest-Zope2

01:42:12

passed SlapOS.Eggs.UnitTest-Master.Python2

00:16:43

passed SlapOS.Eggs.UnitTest-Master.Python3

00:18:38

passed Wendelin.UnitTest-Master

00:22:24