Fixed [FD-50921] - base64-encoded image files for asset creation was broken #18003
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The bulk of this fix is just the call to
parent::prepareForValidation()in theStoreAssetRequest.phpfile.While I was troubleshooting this I decided to make it so that any base64-encoded data must be presented as a
data:-style URL. Unfortunately, my exception-throwing code doesn't seem to work, but the request still fails correctly if the data is not encoded correctly (i.e. as a data: URL with the base64 option).While I was in there - and to prevent us from breaking this again in the future - I added a basic test for the functionality.