Add libaio in Dockerfile for vscode

Rafal Bielskirequested to merge
rbielski/athena:libaio into master

Fixes ATLINFR-3517, i.e. missing libaio in the container for development inside Visual Studio Code
(https://atlassoftwaredocs.web.cern.ch/guides/vscode/docker/)

Edited by Rafal Bielski

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