Alias audio -> sound

BUR #36052 has been approved by @evazion.

create alias audio -> sound

Utility alias since there are "has audio" alias to sound tag but not simply "audio" yet.

According to the sound wiki:

This tag is automatically added by Danbooru to videos with audible sound.

This utility alias achieves nothing. Nobody is manually tagging this.

Not just that no one is manually tagging it but you literally can't either. Sound is automatically managed, it can't be added manually. Try adding the tag to any random post such as an animated one without any sound (animated -sound) or just a random is:png image. The tag edit won't go through.

BUR #36070 has been approved by @evazion.

remove alias has_audio -> sound

I'll replace has audio -> sound with audio -> sound. There are people who search for audio, probably because of the *_audio tags.

The bulk update request #36070 (forum #332777) has been approved by @evazion.

The bulk update request #36052 (forum #332704) has been approved by @evazion.