GenerateImageVersionsService cannot process ICO and SVG files

The service that generates thumbnail images for designs uploaded to Design Management, GenerateImageVersionsService, will currently not process images that are ICO or SVG.

ICO files

Processing ICO is disabled, as attempting to process them would result in an error:

CarrierWave::ProcessingError: Failed to manipulate with MiniMagick, maybe it is not an image? Original Error: `gm identify /var/folders/41/wxms3r2x1jv49q41wps195nh0000gn/T/mini_magick20200218-44861-ooalr6` failed with error:
gm identify: No decode delegate for this image format (/var/folders/41/wxms3r2x1jv49q41wps195nh0000gn/T/mini_magick20200218-44861-ooalr6).
gm identify: Request did not return an image.
from /Users/luke/.rbenv/versions/2.6.5/lib/ruby/gems/2.6.0/gems/carrierwave-1.3.1/lib/carrierwave/processing/mini_magick.rb:323:in `rescue in manipulate!'

SVG files

Processing SVG files is disabled as we currently do not have the ability to process SVG files safely. See https://github.com/carrierwaveuploader/carrierwave#cve-2016-3714-imagetragick.