[HHH-14263] Skip audit non-insertable, non-updateable components

[mgtriffid]

This is hardly an optimal solution. And maybe straight up wrong. Ideally we should skip these synthetic properties that were created for join during audit here https://github.com/hibernate/hibernate-orm/blob/master/hibernate-envers/src/main/java/org/hibernate/envers/internal/entities/mapper/MultiPropertyMapper.java#L114 However, for some reason propertyData for synthetic property created for join has isSynthetic == false. And any attempts to drag that value with correct value of true ended with strange errors way earlier, during metadata generation.

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