issue: https://linear.app/comm/issue/ENG-4681/create-action-objects-for-all-actions
uploadMultimedia will be replaced by useBlobServiceUpload once blob service starts working. uploadMediaMetadata was not being used and is not needed anymore, as explained in https://linear.app/comm/issue/ENG-5174/get-rid-of-uploadmediametadata-action

Tested the deleteUpload action. The change to blobServiceUpload is the same as the changes to multiple actions before, so I think it's fair to assume that it's working after countless other actions with the same changes have been tested. The problem with testing it is that it calls the blob service and would break the db state