Alias bug wings to insect wings

BUR #367 has been approved by @Lyren.

create alias bug_wings -> insect_wings

Self-explanatory, no reason to have both tags.

Might wanna create implications for e.g. moth_wings -> insect wings while we're at it.

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

The bulk update request #367 (forum #2467) has been approved by @Lyren.