This is part of #103699 and tackles the new deprecated renderCodicon function which we should replace with renderCodiconsAsElement

• src/vs/editor/contrib/codelens/codelensWidget.ts @jrieken
• src/vs/base/browser/ui/highlightedlabel/highlightedLabel.ts @eamodio
• src/vs/base/browser/markdownRenderer.ts @eamodio