This is follow-up to work done for T428220.
We want to reduce the number of modules loaded for icons in SkinMinerva.php. Having multiple modules is bad for front-end performance. Here's a related gerrit comment. https://gerrit.wikimedia.org/r/c/mediawiki/skins/MinervaNeue/+/1306430/comment/5c20b2eb_e7fe2ef4/