Sk8 the Infinity real name aliases

BUR #8287 has been approved by @evazion.

create alias chinen_miya -> miya_(sk8)
create alias sakurayashiki_kaoru -> cherry_blossom_(sk8)
create alias nanjou_kojirou -> joe_(sk8)
create alias shindou_ainosuke -> adam_(sk8)

As per the example of Boku no Hero Academia and other series where characters go by codenames, requesting real name aliases.

The bulk update request #8287 (forum #202483) has been approved by @evazion.