change leg_bracelet alias

BUR #38647 has been approved by @nonamethanks.

remove alias leg_bracelet -> anklet
create alias upper_leg_bracelet -> thighlet
create alias lower_leg_bracelet -> anklet

thighlet exists; leglet exists too but I'm not sure where it would fit

BUR #38648 has been rejected.

create alias leglet -> thighlet

Bonus BUR
They seem to be used for the same thing more or less.

The bulk update request #38647 (forum #341605) has been approved by @nonamethanks.

BUR #39161 has been approved by @nonamethanks.

deprecate leglet

Deprecating in favor of either of the above tags.

The bulk update request #38648 (forum #341606) has been rejected by @nonamethanks.

The bulk update request #39161 (forum #343906) has been approved by @nonamethanks.

What should the jewelry in something like post #7517149 be tagged as, since it's neither on the thigh nor the ankle? Should we make an additional calf bracelet-esque tag?