Imply shiina_kagari_(child) -> shiina_kagari

BUR #53750 has been approved by @evazion.

create implication shiina_kagari_(child) -> shiina_kagari

Unique design

We don't use this word as a qualifier. It should be young.

BUR #53763 has been approved by @evazion.

create alias shiina_kagari_(child) -> shiina_kagari_(young)

The original BUR can be passed as-is. This BUR will fix the tag name. Many of the previous *_(child) tags still exist as aliases anyway.

The bulk update request #53750 (forum #414606) has been approved by @evazion.

The bulk update request #53763 (forum #414639) has been approved by @evazion.