Renaming chartag for Buena Vista's old design

BUR #27853 has been approved by @nonamethanks.

rename buena_vista_(umamusume) -> buena_vista_(umamusume)_(old_design)

Due to Buena Vista getting a redesign from her old one, I'm requesting a different chartag just like in topic #26414.

Just a head-up, you can use rename instead of create/remove alias as the tagcount doesn't reach 200 yet as of this writing.

The bulk update request #27853 (forum #286868) has been approved by @nonamethanks.