Consistent qualifiers for Centurii-chan's OCs

BUR #40534 has been approved by @nonamethanks.

create alias executioner_maid_(centuriic) -> executioner_maid_(centurii-chan)
create alias longsword-chan_(centurii) -> longsword-chan_(centurii-chan)
create alias rapier-chan_(centurii) -> rapier-chan_(centurii-chan)
create alias executioner_maid_(apprentice)_(centuriic) -> executioner_maid_(apprentice)_(centurii-chan)

Like the tag legate_(centurii-chan), the rest of Centurii-chan’s OCs have the artist’s full name in their qualifier. These four, and thus all OCs, should have the same qualifier for consistency.

I assume that these are a consequence of Centurii-chan's own tag once being CenturiiC (as visible in the artist entry history) and people just never getting around to renaming them. People forgetting to check if there's tags using an artist tag's name in a qualifier before renaming the tag in question is a common occurance.

The bulk update request #40534 (forum #349493) has been approved by @nonamethanks.