Fix missing packages in composerBuilderTag image used for the Upgrade Drupal to Distro 10.2

During the update of the image dependencies to use the latest version that was implemented along with the drupal upgrade to 10.2 (#32 (closed)), the packages php8-mbstring and php8-pecl-imagick had to be updated to php81-pecl-imagick and php81-mbstring, so as to be available from the latest v3.19 alpine repos. It has been identified from an incident raised in alice-figure site (https://cern.service-now.com/nav_to.do?uri=incident.do?sys_id=899f68a697bec2107e7137a71153af28) #35 (closed), that those packages had different dependencies than the preexisting, therefore leading to some other packages that were available before, not to be installed. The missing packages must be identified and added to the Dockerfile of the ' composerBuilderTag' explicitly, to avoid future issues and resolve the incident.