Removing holding_bikini -> holding_swimsuit aliases

The bulk update request #14754 has been rejected.

remove alias holding_bikini -> holding_swimsuit
remove alias holding_bikini_top -> holding_swimsuit
remove alias holding_bikini_bottom -> holding_swimsuit
create implication holding_bikini_top -> holding_bikini
create implication holding_bikini_bottom -> holding_bikini

Since we're making the split between one-pieces and bikinis for all the other x_swimsuit tags, these aliases need to go. I've also included implications for tops/bottoms to imply holding_bikini.

This bulk update request is pending automatic rejection in 5 days.

This bulk update request has been rejected because it was not approved within 45 days.

The bulk update request #14754 (forum #231736) has been rejected by @DanbooruBot.